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Finding the Fourth Proportional to 339,147.70, 508,721.55 and 260,658.10

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Solution

The fourth proportional to 339,147.70, 508,721.55 and 260,658.10 is: 390,987.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,147.70 : 508,721.55 = 260,658.10 : x
  2. Step 2: Convert to fraction form
    339,147.70/508,721.55 = 260,658.10/x
  3. Step 3: Cross multiply
    339,147.70x = 508,721.55 × 260,658.10
  4. Step 4: Simplify right side
    339,147.70x = 132,602,392,652.06
  5. Step 5: Solve for x
    x = 132,602,392,652.06/339,147.70
  6. Step 6: Final answer
    x = 390,987.15

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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.