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Finding the Fourth Proportional to 664,998.90, 997,498.35 and 265,701.30

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Solution

The fourth proportional to 664,998.90, 997,498.35 and 265,701.30 is: 398,551.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,998.90 : 997,498.35 = 265,701.30 : x
  2. Step 2: Convert to fraction form
    664,998.90/997,498.35 = 265,701.30/x
  3. Step 3: Cross multiply
    664,998.90x = 997,498.35 × 265,701.30
  4. Step 4: Simplify right side
    664,998.90x = 265,036,608,342.86
  5. Step 5: Solve for x
    x = 265,036,608,342.86/664,998.90
  6. Step 6: Final answer
    x = 398,551.95

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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.