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Finding the Fourth Proportional to 1,555.46, 2,332.63 and 515.27

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Solution

The fourth proportional to 1,555.46, 2,332.63 and 515.27 is: 772.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.46 : 2,332.63 = 515.27 : x
  2. Step 2: Convert to fraction form
    1,555.46/2,332.63 = 515.27/x
  3. Step 3: Cross multiply
    1,555.46x = 2,332.63 × 515.27
  4. Step 4: Simplify right side
    1,555.46x = 1,201,934.26
  5. Step 5: Solve for x
    x = 1,201,934.26/1,555.46
  6. Step 6: Final answer
    x = 772.72

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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.