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Finding the Fourth Proportional to 581,443.40, 872,165.10 and 483,139.40

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Solution

The fourth proportional to 581,443.40, 872,165.10 and 483,139.40 is: 724,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,443.40 : 872,165.10 = 483,139.40 : x
  2. Step 2: Convert to fraction form
    581,443.40/872,165.10 = 483,139.40/x
  3. Step 3: Cross multiply
    581,443.40x = 872,165.10 × 483,139.40
  4. Step 4: Simplify right side
    581,443.40x = 421,377,323,114.94
  5. Step 5: Solve for x
    x = 421,377,323,114.94/581,443.40
  6. Step 6: Final answer
    x = 724,709.10

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Half scale
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Double scale
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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.