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Finding the Fourth Proportional to 458,165.70, 687,248.55 and 208,847.70

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Solution

The fourth proportional to 458,165.70, 687,248.55 and 208,847.70 is: 313,271.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,165.70 : 687,248.55 = 208,847.70 : x
  2. Step 2: Convert to fraction form
    458,165.70/687,248.55 = 208,847.70/x
  3. Step 3: Cross multiply
    458,165.70x = 687,248.55 × 208,847.70
  4. Step 4: Simplify right side
    458,165.70x = 143,530,278,995.84
  5. Step 5: Solve for x
    x = 143,530,278,995.84/458,165.70
  6. Step 6: Final answer
    x = 313,271.55

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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.