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Finding the Fourth Proportional to 491,670.20, 736,986.90 and 280,854.20

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Solution

The fourth proportional to 491,670.20, 736,986.90 and 280,854.20 is: 420,985.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,670.20 : 736,986.90 = 280,854.20 : x
  2. Step 2: Convert to fraction form
    491,670.20/736,986.90 = 280,854.20/x
  3. Step 3: Cross multiply
    491,670.20x = 736,986.90 × 280,854.20
  4. Step 4: Simplify right side
    491,670.20x = 206,985,866,209.98
  5. Step 5: Solve for x
    x = 206,985,866,209.98/491,670.20
  6. Step 6: Final answer
    x = 420,985.18

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1.5x scale

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.