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Finding the Fourth Proportional to 1,653.45, 2,479.54 and 542.61

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Solution

The fourth proportional to 1,653.45, 2,479.54 and 542.61 is: 813.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,653.45 : 2,479.54 = 542.61 : x
  2. Step 2: Convert to fraction form
    1,653.45/2,479.54 = 542.61/x
  3. Step 3: Cross multiply
    1,653.45x = 2,479.54 × 542.61
  4. Step 4: Simplify right side
    1,653.45x = 1,345,423.20
  5. Step 5: Solve for x
    x = 1,345,423.20/1,653.45
  6. Step 6: Final answer
    x = 813.71

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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.