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Finding the Fourth Proportional to 618,391.32, 928,640.15 and 402,617.34

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Solution

The fourth proportional to 618,391.32, 928,640.15 and 402,617.34 is: 604,611.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,391.32 : 928,640.15 = 402,617.34 : x
  2. Step 2: Convert to fraction form
    618,391.32/928,640.15 = 402,617.34/x
  3. Step 3: Cross multiply
    618,391.32x = 928,640.15 × 402,617.34
  4. Step 4: Simplify right side
    618,391.32x = 373,886,627,010.20
  5. Step 5: Solve for x
    x = 373,886,627,010.20/618,391.32
  6. Step 6: Final answer
    x = 604,611.70

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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.