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Finding the Fourth Proportional to 519,554.80, 717,480.80 and 491,249.73

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Solution

The fourth proportional to 519,554.80, 717,480.80 and 491,249.73 is: 678,392.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,554.80 : 717,480.80 = 491,249.73 : x
  2. Step 2: Convert to fraction form
    519,554.80/717,480.80 = 491,249.73/x
  3. Step 3: Cross multiply
    519,554.80x = 717,480.80 × 491,249.73
  4. Step 4: Simplify right side
    519,554.80x = 352,462,249,280.18
  5. Step 5: Solve for x
    x = 352,462,249,280.18/519,554.80
  6. Step 6: Final answer
    x = 678,392.83

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1.5x scale

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.