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Finding the Fourth Proportional to 539,019.20, 808,531.20 and 139,631.60

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Solution

The fourth proportional to 539,019.20, 808,531.20 and 139,631.60 is: 209,448.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,019.20 : 808,531.20 = 139,631.60 : x
  2. Step 2: Convert to fraction form
    539,019.20/808,531.20 = 139,631.60/x
  3. Step 3: Cross multiply
    539,019.20x = 808,531.20 × 139,631.60
  4. Step 4: Simplify right side
    539,019.20x = 112,896,505,105.92
  5. Step 5: Solve for x
    x = 112,896,505,105.92/539,019.20
  6. Step 6: Final answer
    x = 209,448.02

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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.