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Finding the Fourth Proportional to 633,699.64, 948,639.88 and 408,612.39

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Solution

The fourth proportional to 633,699.64, 948,639.88 and 408,612.39 is: 611,687.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,699.64 : 948,639.88 = 408,612.39 : x
  2. Step 2: Convert to fraction form
    633,699.64/948,639.88 = 408,612.39/x
  3. Step 3: Cross multiply
    633,699.64x = 948,639.88 × 408,612.39
  4. Step 4: Simplify right side
    633,699.64x = 387,626,008,616.11
  5. Step 5: Solve for x
    x = 387,626,008,616.11/633,699.64
  6. Step 6: Final answer
    x = 611,687.28

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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.