Home / 614,731.20-921,112.65-389,688.90

Finding the Fourth Proportional to 614,731.20, 921,112.65 and 389,688.90

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Solution

The fourth proportional to 614,731.20, 921,112.65 and 389,688.90 is: 583,909.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,731.20 : 921,112.65 = 389,688.90 : x
  2. Step 2: Convert to fraction form
    614,731.20/921,112.65 = 389,688.90/x
  3. Step 3: Cross multiply
    614,731.20x = 921,112.65 × 389,688.90
  4. Step 4: Simplify right side
    614,731.20x = 358,947,375,354.59
  5. Step 5: Solve for x
    x = 358,947,375,354.59/614,731.20
  6. Step 6: Final answer
    x = 583,909.48

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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.