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Finding the Fourth Proportional to 665,125.20, 998,314.20 and 349,808.40

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Solution

The fourth proportional to 665,125.20, 998,314.20 and 349,808.40 is: 525,042.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,125.20 : 998,314.20 = 349,808.40 : x
  2. Step 2: Convert to fraction form
    665,125.20/998,314.20 = 349,808.40/x
  3. Step 3: Cross multiply
    665,125.20x = 998,314.20 × 349,808.40
  4. Step 4: Simplify right side
    665,125.20x = 349,218,692,999.28
  5. Step 5: Solve for x
    x = 349,218,692,999.28/665,125.20
  6. Step 6: Final answer
    x = 525,042.04

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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.