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Finding the Fourth Proportional to 539,027.20, 808,543.20 and 139,639.60

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Solution

The fourth proportional to 539,027.20, 808,543.20 and 139,639.60 is: 209,460.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,027.20 : 808,543.20 = 139,639.60 : x
  2. Step 2: Convert to fraction form
    539,027.20/808,543.20 = 139,639.60/x
  3. Step 3: Cross multiply
    539,027.20x = 808,543.20 × 139,639.60
  4. Step 4: Simplify right side
    539,027.20x = 112,904,649,030.72
  5. Step 5: Solve for x
    x = 112,904,649,030.72/539,027.20
  6. Step 6: Final answer
    x = 209,460.02

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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.