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Finding the Fourth Proportional to 665,337.40, 998,006.10 and 486,003.40

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Solution

The fourth proportional to 665,337.40, 998,006.10 and 486,003.40 is: 729,005.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,337.40 : 998,006.10 = 486,003.40 : x
  2. Step 2: Convert to fraction form
    665,337.40/998,006.10 = 486,003.40/x
  3. Step 3: Cross multiply
    665,337.40x = 998,006.10 × 486,003.40
  4. Step 4: Simplify right side
    665,337.40x = 485,034,357,820.74
  5. Step 5: Solve for x
    x = 485,034,357,820.74/665,337.40
  6. Step 6: Final answer
    x = 729,005.10

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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.