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Finding the Fourth Proportional to 665,402.31, 998,389.40 and 216,260.82

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Solution

The fourth proportional to 665,402.31, 998,389.40 and 216,260.82 is: 324,484.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,402.31 : 998,389.40 = 216,260.82 : x
  2. Step 2: Convert to fraction form
    665,402.31/998,389.40 = 216,260.82/x
  3. Step 3: Cross multiply
    665,402.31x = 998,389.40 × 216,260.82
  4. Step 4: Simplify right side
    665,402.31x = 215,912,509,242.00
  5. Step 5: Solve for x
    x = 215,912,509,242.00/665,402.31
  6. Step 6: Final answer
    x = 324,484.16

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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.