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Finding the Fourth Proportional to 665,396.31, 998,380.40 and 216,254.82

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Solution

The fourth proportional to 665,396.31, 998,380.40 and 216,254.82 is: 324,475.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,396.31 : 998,380.40 = 216,254.82 : x
  2. Step 2: Convert to fraction form
    665,396.31/998,380.40 = 216,254.82/x
  3. Step 3: Cross multiply
    665,396.31x = 998,380.40 × 216,254.82
  4. Step 4: Simplify right side
    665,396.31x = 215,904,572,612.25
  5. Step 5: Solve for x
    x = 215,904,572,612.25/665,396.31
  6. Step 6: Final answer
    x = 324,475.16

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1.5x scale

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.