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Finding the Fourth Proportional to 665,334.90, 998,002.35 and 486,000.90

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Solution

The fourth proportional to 665,334.90, 998,002.35 and 486,000.90 is: 729,001.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,334.90 : 998,002.35 = 486,000.90 : x
  2. Step 2: Convert to fraction form
    665,334.90/998,002.35 = 486,000.90/x
  3. Step 3: Cross multiply
    665,334.90x = 998,002.35 × 486,000.90
  4. Step 4: Simplify right side
    665,334.90x = 485,030,040,302.12
  5. Step 5: Solve for x
    x = 485,030,040,302.12/665,334.90
  6. Step 6: Final answer
    x = 729,001.35

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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.