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Finding the Fourth Proportional to 478,806.18, 718,150.74 and 123,790.47

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Solution

The fourth proportional to 478,806.18, 718,150.74 and 123,790.47 is: 185,670.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,806.18 : 718,150.74 = 123,790.47 : x
  2. Step 2: Convert to fraction form
    478,806.18/718,150.74 = 123,790.47/x
  3. Step 3: Cross multiply
    478,806.18x = 718,150.74 × 123,790.47
  4. Step 4: Simplify right side
    478,806.18x = 88,900,217,635.45
  5. Step 5: Solve for x
    x = 88,900,217,635.45/478,806.18
  6. Step 6: Final answer
    x = 185,670.57

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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.