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Finding the Fourth Proportional to 708,488.26, 977,850.26 and 491,286.35

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Solution

The fourth proportional to 708,488.26, 977,850.26 and 491,286.35 is: 678,069.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,488.26 : 977,850.26 = 491,286.35 : x
  2. Step 2: Convert to fraction form
    708,488.26/977,850.26 = 491,286.35/x
  3. Step 3: Cross multiply
    708,488.26x = 977,850.26 × 491,286.35
  4. Step 4: Simplify right side
    708,488.26x = 480,404,486,912.47
  5. Step 5: Solve for x
    x = 480,404,486,912.47/708,488.26
  6. Step 6: Final answer
    x = 678,069.79

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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.