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Finding the Fourth Proportional to 349,430.85, 523,800.68 and 138,787.65

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Solution

The fourth proportional to 349,430.85, 523,800.68 and 138,787.65 is: 208,044.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    349,430.85 : 523,800.68 = 138,787.65 : x
  2. Step 2: Convert to fraction form
    349,430.85/523,800.68 = 138,787.65/x
  3. Step 3: Cross multiply
    349,430.85x = 523,800.68 × 138,787.65
  4. Step 4: Simplify right side
    349,430.85x = 72,697,064,751.66
  5. Step 5: Solve for x
    x = 72,697,064,751.66/349,430.85
  6. Step 6: Final answer
    x = 208,044.21

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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.