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Finding the Fourth Proportional to 665,530.71, 998,399.28 and 281,281.18

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Solution

The fourth proportional to 665,530.71, 998,399.28 and 281,281.18 is: 421,965.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,530.71 : 998,399.28 = 281,281.18 : x
  2. Step 2: Convert to fraction form
    665,530.71/998,399.28 = 281,281.18/x
  3. Step 3: Cross multiply
    665,530.71x = 998,399.28 × 281,281.18
  4. Step 4: Simplify right side
    665,530.71x = 280,830,926,037.70
  5. Step 5: Solve for x
    x = 280,830,926,037.70/665,530.71
  6. Step 6: Final answer
    x = 421,965.39

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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.