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Finding the Fourth Proportional to 551,654.62, 761,360.12 and 309,955.89

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Solution

The fourth proportional to 551,654.62, 761,360.12 and 309,955.89 is: 427,782.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,654.62 : 761,360.12 = 309,955.89 : x
  2. Step 2: Convert to fraction form
    551,654.62/761,360.12 = 309,955.89/x
  3. Step 3: Cross multiply
    551,654.62x = 761,360.12 × 309,955.89
  4. Step 4: Simplify right side
    551,654.62x = 235,988,053,605.11
  5. Step 5: Solve for x
    x = 235,988,053,605.11/551,654.62
  6. Step 6: Final answer
    x = 427,782.25

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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.