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Finding the Fourth Proportional to 870,672.91, 1,201,462.69 and 488,625.88

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Solution

The fourth proportional to 870,672.91, 1,201,462.69 and 488,625.88 is: 674,266.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,672.91 : 1,201,462.69 = 488,625.88 : x
  2. Step 2: Convert to fraction form
    870,672.91/1,201,462.69 = 488,625.88/x
  3. Step 3: Cross multiply
    870,672.91x = 1,201,462.69 × 488,625.88
  4. Step 4: Simplify right side
    870,672.91x = 587,065,764,188.42
  5. Step 5: Solve for x
    x = 587,065,764,188.42/870,672.91
  6. Step 6: Final answer
    x = 674,266.72

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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.