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Finding the Fourth Proportional to 665,013.17, 997,660.06 and 215,699.15

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Solution

The fourth proportional to 665,013.17, 997,660.06 and 215,699.15 is: 323,594.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,013.17 : 997,660.06 = 215,699.15 : x
  2. Step 2: Convert to fraction form
    665,013.17/997,660.06 = 215,699.15/x
  3. Step 3: Cross multiply
    665,013.17x = 997,660.06 × 215,699.15
  4. Step 4: Simplify right side
    665,013.17x = 215,194,428,885.85
  5. Step 5: Solve for x
    x = 215,194,428,885.85/665,013.17
  6. Step 6: Final answer
    x = 323,594.24

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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.