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Finding the Fourth Proportional to 878,612.83, 1,318,362.87 and 398,534.69

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Solution

The fourth proportional to 878,612.83, 1,318,362.87 and 398,534.69 is: 598,003.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,612.83 : 1,318,362.87 = 398,534.69 : x
  2. Step 2: Convert to fraction form
    878,612.83/1,318,362.87 = 398,534.69/x
  3. Step 3: Cross multiply
    878,612.83x = 1,318,362.87 × 398,534.69
  4. Step 4: Simplify right side
    878,612.83x = 525,413,337,702.96
  5. Step 5: Solve for x
    x = 525,413,337,702.96/878,612.83
  6. Step 6: Final answer
    x = 598,003.26

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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.