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Finding the Fourth Proportional to 519,677.40, 717,650.05 and 491,373.87

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Solution

The fourth proportional to 519,677.40, 717,650.05 and 491,373.87 is: 678,564.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,677.40 : 717,650.05 = 491,373.87 : x
  2. Step 2: Convert to fraction form
    519,677.40/717,650.05 = 491,373.87/x
  3. Step 3: Cross multiply
    519,677.40x = 717,650.05 × 491,373.87
  4. Step 4: Simplify right side
    519,677.40x = 352,634,482,374.19
  5. Step 5: Solve for x
    x = 352,634,482,374.19/519,677.40
  6. Step 6: Final answer
    x = 678,564.21

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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.