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Finding the Fourth Proportional to 458,063.16, 686,647.98 and 218,112.59

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Solution

The fourth proportional to 458,063.16, 686,647.98 and 218,112.59 is: 326,956.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,063.16 : 686,647.98 = 218,112.59 : x
  2. Step 2: Convert to fraction form
    458,063.16/686,647.98 = 218,112.59/x
  3. Step 3: Cross multiply
    458,063.16x = 686,647.98 × 218,112.59
  4. Step 4: Simplify right side
    458,063.16x = 149,766,565,902.83
  5. Step 5: Solve for x
    x = 149,766,565,902.83/458,063.16
  6. Step 6: Final answer
    x = 326,956.15

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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.