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Finding the Fourth Proportional to 478,677.93, 718,082.51 and 212,432.55

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Solution

The fourth proportional to 478,677.93, 718,082.51 and 212,432.55 is: 318,677.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,677.93 : 718,082.51 = 212,432.55 : x
  2. Step 2: Convert to fraction form
    478,677.93/718,082.51 = 212,432.55/x
  3. Step 3: Cross multiply
    478,677.93x = 718,082.51 × 212,432.55
  4. Step 4: Simplify right side
    478,677.93x = 152,544,097,647.54
  5. Step 5: Solve for x
    x = 152,544,097,647.54/478,677.93
  6. Step 6: Final answer
    x = 318,677.94

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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.