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Finding the Fourth Proportional to 399,547.44, 551,391.84 and 229,781.70

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Solution

The fourth proportional to 399,547.44, 551,391.84 and 229,781.70 is: 317,108.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,547.44 : 551,391.84 = 229,781.70 : x
  2. Step 2: Convert to fraction form
    399,547.44/551,391.84 = 229,781.70/x
  3. Step 3: Cross multiply
    399,547.44x = 551,391.84 × 229,781.70
  4. Step 4: Simplify right side
    399,547.44x = 126,699,754,361.33
  5. Step 5: Solve for x
    x = 126,699,754,361.33/399,547.44
  6. Step 6: Final answer
    x = 317,108.16

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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.