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Finding the Fourth Proportional to 291,511.71, 402,386.82 and 170,691.84

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Solution

The fourth proportional to 291,511.71, 402,386.82 and 170,691.84 is: 235,613.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,511.71 : 402,386.82 = 170,691.84 : x
  2. Step 2: Convert to fraction form
    291,511.71/402,386.82 = 170,691.84/x
  3. Step 3: Cross multiply
    291,511.71x = 402,386.82 × 170,691.84
  4. Step 4: Simplify right side
    291,511.71x = 68,684,146,697.55
  5. Step 5: Solve for x
    x = 68,684,146,697.55/291,511.71
  6. Step 6: Final answer
    x = 235,613.68

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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.