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Finding the Fourth Proportional to 348,519.80, 522,779.70 and 138,049.40

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Solution

The fourth proportional to 348,519.80, 522,779.70 and 138,049.40 is: 207,074.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,519.80 : 522,779.70 = 138,049.40 : x
  2. Step 2: Convert to fraction form
    348,519.80/522,779.70 = 138,049.40/x
  3. Step 3: Cross multiply
    348,519.80x = 522,779.70 × 138,049.40
  4. Step 4: Simplify right side
    348,519.80x = 72,169,423,917.18
  5. Step 5: Solve for x
    x = 72,169,423,917.18/348,519.80
  6. Step 6: Final answer
    x = 207,074.10

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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.