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Finding the Fourth Proportional to 615,622.60, 923,433.90 and 542,139.40

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Solution

The fourth proportional to 615,622.60, 923,433.90 and 542,139.40 is: 813,209.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,622.60 : 923,433.90 = 542,139.40 : x
  2. Step 2: Convert to fraction form
    615,622.60/923,433.90 = 542,139.40/x
  3. Step 3: Cross multiply
    615,622.60x = 923,433.90 × 542,139.40
  4. Step 4: Simplify right side
    615,622.60x = 500,629,900,485.66
  5. Step 5: Solve for x
    x = 500,629,900,485.66/615,622.60
  6. Step 6: Final answer
    x = 813,209.10

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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.