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Finding the Fourth Proportional to 399,369.08, 551,132.04 and 218,082.32

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Solution

The fourth proportional to 399,369.08, 551,132.04 and 218,082.32 is: 300,955.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,369.08 : 551,132.04 = 218,082.32 : x
  2. Step 2: Convert to fraction form
    399,369.08/551,132.04 = 218,082.32/x
  3. Step 3: Cross multiply
    399,369.08x = 551,132.04 × 218,082.32
  4. Step 4: Simplify right side
    399,369.08x = 120,192,153,909.53
  5. Step 5: Solve for x
    x = 120,192,153,909.53/399,369.08
  6. Step 6: Final answer
    x = 300,955.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.