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Finding the Fourth Proportional to 348,513.80, 522,770.70 and 138,043.40

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Solution

The fourth proportional to 348,513.80, 522,770.70 and 138,043.40 is: 207,065.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,513.80 : 522,770.70 = 138,043.40 : x
  2. Step 2: Convert to fraction form
    348,513.80/522,770.70 = 138,043.40/x
  3. Step 3: Cross multiply
    348,513.80x = 522,770.70 × 138,043.40
  4. Step 4: Simplify right side
    348,513.80x = 72,165,044,848.38
  5. Step 5: Solve for x
    x = 72,165,044,848.38/348,513.80
  6. Step 6: Final answer
    x = 207,065.10

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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.