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Finding the Fourth Proportional to 519,672.08, 717,642.71 and 491,368.55

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Solution

The fourth proportional to 519,672.08, 717,642.71 and 491,368.55 is: 678,556.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,672.08 : 717,642.71 = 491,368.55 : x
  2. Step 2: Convert to fraction form
    519,672.08/717,642.71 = 491,368.55/x
  3. Step 3: Cross multiply
    519,672.08x = 717,642.71 × 491,368.55
  4. Step 4: Simplify right side
    519,672.08x = 352,627,057,830.77
  5. Step 5: Solve for x
    x = 352,627,057,830.77/519,672.08
  6. Step 6: Final answer
    x = 678,556.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.