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Finding the Fourth Proportional to 660,295.80, 911,663.10 and 488,251.80

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Solution

The fourth proportional to 660,295.80, 911,663.10 and 488,251.80 is: 674,123.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,295.80 : 911,663.10 = 488,251.80 : x
  2. Step 2: Convert to fraction form
    660,295.80/911,663.10 = 488,251.80/x
  3. Step 3: Cross multiply
    660,295.80x = 911,663.10 × 488,251.80
  4. Step 4: Simplify right side
    660,295.80x = 445,121,149,568.58
  5. Step 5: Solve for x
    x = 445,121,149,568.58/660,295.80
  6. Step 6: Final answer
    x = 674,123.85

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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.