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Finding the Fourth Proportional to 659,498.97, 988,583.85 and 259,985.10

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Solution

The fourth proportional to 659,498.97, 988,583.85 and 259,985.10 is: 389,715.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,498.97 : 988,583.85 = 259,985.10 : x
  2. Step 2: Convert to fraction form
    659,498.97/988,583.85 = 259,985.10/x
  3. Step 3: Cross multiply
    659,498.97x = 988,583.85 × 259,985.10
  4. Step 4: Simplify right side
    659,498.97x = 257,017,071,100.64
  5. Step 5: Solve for x
    x = 257,017,071,100.64/659,498.97
  6. Step 6: Final answer
    x = 389,715.65

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Half scale
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Double scale
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Similar ratio
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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.