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Finding the Fourth Proportional to 615,139.80, 923,400.90 and 475,517.40

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Solution

The fourth proportional to 615,139.80, 923,400.90 and 475,517.40 is: 713,810.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,139.80 : 923,400.90 = 475,517.40 : x
  2. Step 2: Convert to fraction form
    615,139.80/923,400.90 = 475,517.40/x
  3. Step 3: Cross multiply
    615,139.80x = 923,400.90 × 475,517.40
  4. Step 4: Simplify right side
    615,139.80x = 439,093,195,125.66
  5. Step 5: Solve for x
    x = 439,093,195,125.66/615,139.80
  6. Step 6: Final answer
    x = 713,810.41

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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.