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Finding the Fourth Proportional to 487,679.40, 731,421.90 and 234,959.40

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Solution

The fourth proportional to 487,679.40, 731,421.90 and 234,959.40 is: 352,392.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,679.40 : 731,421.90 = 234,959.40 : x
  2. Step 2: Convert to fraction form
    487,679.40/731,421.90 = 234,959.40/x
  3. Step 3: Cross multiply
    487,679.40x = 731,421.90 × 234,959.40
  4. Step 4: Simplify right side
    487,679.40x = 171,854,450,770.86
  5. Step 5: Solve for x
    x = 171,854,450,770.86/487,679.40
  6. Step 6: Final answer
    x = 352,392.27

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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.