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Finding the Fourth Proportional to 581,011.60, 871,517.40 and 206,899.60

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Solution

The fourth proportional to 581,011.60, 871,517.40 and 206,899.60 is: 310,349.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,011.60 : 871,517.40 = 206,899.60 : x
  2. Step 2: Convert to fraction form
    581,011.60/871,517.40 = 206,899.60/x
  3. Step 3: Cross multiply
    581,011.60x = 871,517.40 × 206,899.60
  4. Step 4: Simplify right side
    581,011.60x = 180,316,601,453.04
  5. Step 5: Solve for x
    x = 180,316,601,453.04/581,011.60
  6. Step 6: Final answer
    x = 310,349.40

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Half scale
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Double scale
Find fourth proportional to 581,012.60, 871,518.90 and 206,900.60
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.