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Finding the Fourth Proportional to 665,898.31, 998,856.66 and 216,621.53

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Solution

The fourth proportional to 665,898.31, 998,856.66 and 216,621.53 is: 324,935.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,898.31 : 998,856.66 = 216,621.53 : x
  2. Step 2: Convert to fraction form
    665,898.31/998,856.66 = 216,621.53/x
  3. Step 3: Cross multiply
    665,898.31x = 998,856.66 × 216,621.53
  4. Step 4: Simplify right side
    665,898.31x = 216,373,852,945.61
  5. Step 5: Solve for x
    x = 216,373,852,945.61/665,898.31
  6. Step 6: Final answer
    x = 324,935.28

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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.