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Finding the Fourth Proportional to 399,646.32, 551,505.36 and 218,354.32

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Solution

The fourth proportional to 399,646.32, 551,505.36 and 218,354.32 is: 301,325.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,646.32 : 551,505.36 = 218,354.32 : x
  2. Step 2: Convert to fraction form
    399,646.32/551,505.36 = 218,354.32/x
  3. Step 3: Cross multiply
    399,646.32x = 551,505.36 × 218,354.32
  4. Step 4: Simplify right side
    399,646.32x = 120,423,577,859.16
  5. Step 5: Solve for x
    x = 120,423,577,859.16/399,646.32
  6. Step 6: Final answer
    x = 301,325.38

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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.