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Finding the Fourth Proportional to 615,387.94, 921,294.21 and 358,437.04

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Solution

The fourth proportional to 615,387.94, 921,294.21 and 358,437.04 is: 536,614.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,387.94 : 921,294.21 = 358,437.04 : x
  2. Step 2: Convert to fraction form
    615,387.94/921,294.21 = 358,437.04/x
  3. Step 3: Cross multiply
    615,387.94x = 921,294.21 × 358,437.04
  4. Step 4: Simplify right side
    615,387.94x = 330,225,969,601.54
  5. Step 5: Solve for x
    x = 330,225,969,601.54/615,387.94
  6. Step 6: Final answer
    x = 536,614.30

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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.