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Finding the Fourth Proportional to 1,613.90, 2,423.58 and 992.82

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Solution

The fourth proportional to 1,613.90, 2,423.58 and 992.82 is: 1,490.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,613.90 : 2,423.58 = 992.82 : x
  2. Step 2: Convert to fraction form
    1,613.90/2,423.58 = 992.82/x
  3. Step 3: Cross multiply
    1,613.90x = 2,423.58 × 992.82
  4. Step 4: Simplify right side
    1,613.90x = 2,406,178.70
  5. Step 5: Solve for x
    x = 2,406,178.70/1,613.90
  6. Step 6: Final answer
    x = 1,490.91

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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.