Home / 649,259.20-972,139.20-509,291.20

Finding the Fourth Proportional to 649,259.20, 972,139.20 and 509,291.20

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Solution

The fourth proportional to 649,259.20, 972,139.20 and 509,291.20 is: 762,564.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,259.20 : 972,139.20 = 509,291.20 : x
  2. Step 2: Convert to fraction form
    649,259.20/972,139.20 = 509,291.20/x
  3. Step 3: Cross multiply
    649,259.20x = 972,139.20 × 509,291.20
  4. Step 4: Simplify right side
    649,259.20x = 495,101,939,735.04
  5. Step 5: Solve for x
    x = 495,101,939,735.04/649,259.20
  6. Step 6: Final answer
    x = 762,564.38

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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.