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Finding the Fourth Proportional to 1,555.09, 2,332.76 and 515.05

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Solution

The fourth proportional to 1,555.09, 2,332.76 and 515.05 is: 772.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.09 : 2,332.76 = 515.05 : x
  2. Step 2: Convert to fraction form
    1,555.09/2,332.76 = 515.05/x
  3. Step 3: Cross multiply
    1,555.09x = 2,332.76 × 515.05
  4. Step 4: Simplify right side
    1,555.09x = 1,201,479.63
  5. Step 5: Solve for x
    x = 1,201,479.63/1,555.09
  6. Step 6: Final answer
    x = 772.61

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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.