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Finding the Fourth Proportional to 458,526.61, 687,926.60 and 218,820.48

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Solution

The fourth proportional to 458,526.61, 687,926.60 and 218,820.48 is: 328,295.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,526.61 : 687,926.60 = 218,820.48 : x
  2. Step 2: Convert to fraction form
    458,526.61/687,926.60 = 218,820.48/x
  3. Step 3: Cross multiply
    458,526.61x = 687,926.60 × 218,820.48
  4. Step 4: Simplify right side
    458,526.61x = 150,532,428,816.77
  5. Step 5: Solve for x
    x = 150,532,428,816.77/458,526.61
  6. Step 6: Final answer
    x = 328,295.95

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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.