Home / 665,722.40-998,583.60-559,434.20

Finding the Fourth Proportional to 665,722.40, 998,583.60 and 559,434.20

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Solution

The fourth proportional to 665,722.40, 998,583.60 and 559,434.20 is: 839,151.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,722.40 : 998,583.60 = 559,434.20 : x
  2. Step 2: Convert to fraction form
    665,722.40/998,583.60 = 559,434.20/x
  3. Step 3: Cross multiply
    665,722.40x = 998,583.60 × 559,434.20
  4. Step 4: Simplify right side
    665,722.40x = 558,641,817,399.12
  5. Step 5: Solve for x
    x = 558,641,817,399.12/665,722.40
  6. Step 6: Final answer
    x = 839,151.30

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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.