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Finding the Fourth Proportional to 339,686.55, 509,531.04 and 103,031.28

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Solution

The fourth proportional to 339,686.55, 509,531.04 and 103,031.28 is: 154,547.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,686.55 : 509,531.04 = 103,031.28 : x
  2. Step 2: Convert to fraction form
    339,686.55/509,531.04 = 103,031.28/x
  3. Step 3: Cross multiply
    339,686.55x = 509,531.04 × 103,031.28
  4. Step 4: Simplify right side
    339,686.55x = 52,497,635,250.93
  5. Step 5: Solve for x
    x = 52,497,635,250.93/339,686.55
  6. Step 6: Final answer
    x = 154,547.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.