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Finding the Fourth Proportional to 908,700.55, 1,358,029.27 and 856,198.88

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Solution

The fourth proportional to 908,700.55, 1,358,029.27 and 856,198.88 is: 1,279,566.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    908,700.55 : 1,358,029.27 = 856,198.88 : x
  2. Step 2: Convert to fraction form
    908,700.55/1,358,029.27 = 856,198.88/x
  3. Step 3: Cross multiply
    908,700.55x = 1,358,029.27 × 856,198.88
  4. Step 4: Simplify right side
    908,700.55x = 1,162,743,140,765.33
  5. Step 5: Solve for x
    x = 1,162,743,140,765.33/908,700.55
  6. Step 6: Final answer
    x = 1,279,566.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.