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Finding the Fourth Proportional to 399,429.51, 551,139.66 and 227,337.30

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Solution

The fourth proportional to 399,429.51, 551,139.66 and 227,337.30 is: 313,683.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,429.51 : 551,139.66 = 227,337.30 : x
  2. Step 2: Convert to fraction form
    399,429.51/551,139.66 = 227,337.30/x
  3. Step 3: Cross multiply
    399,429.51x = 551,139.66 × 227,337.30
  4. Step 4: Simplify right side
    399,429.51x = 125,294,602,227.32
  5. Step 5: Solve for x
    x = 125,294,602,227.32/399,429.51
  6. Step 6: Final answer
    x = 313,683.89

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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.