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Finding the Fourth Proportional to 539,978.81, 809,957.28 and 140,610.74

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Solution

The fourth proportional to 539,978.81, 809,957.28 and 140,610.74 is: 210,913.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,978.81 : 809,957.28 = 140,610.74 : x
  2. Step 2: Convert to fraction form
    539,978.81/809,957.28 = 140,610.74/x
  3. Step 3: Cross multiply
    539,978.81x = 809,957.28 × 140,610.74
  4. Step 4: Simplify right side
    539,978.81x = 113,888,692,509.19
  5. Step 5: Solve for x
    x = 113,888,692,509.19/539,978.81
  6. Step 6: Final answer
    x = 210,913.26

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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.