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Finding the Fourth Proportional to 458,013.80, 687,020.70 and 192,074.60

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Solution

The fourth proportional to 458,013.80, 687,020.70 and 192,074.60 is: 288,111.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,013.80 : 687,020.70 = 192,074.60 : x
  2. Step 2: Convert to fraction form
    458,013.80/687,020.70 = 192,074.60/x
  3. Step 3: Cross multiply
    458,013.80x = 687,020.70 × 192,074.60
  4. Step 4: Simplify right side
    458,013.80x = 131,959,226,144.22
  5. Step 5: Solve for x
    x = 131,959,226,144.22/458,013.80
  6. Step 6: Final answer
    x = 288,111.90

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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.