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Finding the Fourth Proportional to 625,655.40, 863,408.88 and 339,180

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Solution

The fourth proportional to 625,655.40, 863,408.88 and 339,180 is: 468,070.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,655.40 : 863,408.88 = 339,180 : x
  2. Step 2: Convert to fraction form
    625,655.40/863,408.88 = 339,180/x
  3. Step 3: Cross multiply
    625,655.40x = 863,408.88 × 339,180
  4. Step 4: Simplify right side
    625,655.40x = 292,851,023,918.40
  5. Step 5: Solve for x
    x = 292,851,023,918.40/625,655.40
  6. Step 6: Final answer
    x = 468,070.80

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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.