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Finding the Fourth Proportional to 1,685.78, 2,529.13 and 955.87

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Solution

The fourth proportional to 1,685.78, 2,529.13 and 955.87 is: 1,434.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.78 : 2,529.13 = 955.87 : x
  2. Step 2: Convert to fraction form
    1,685.78/2,529.13 = 955.87/x
  3. Step 3: Cross multiply
    1,685.78x = 2,529.13 × 955.87
  4. Step 4: Simplify right side
    1,685.78x = 2,417,514.71
  5. Step 5: Solve for x
    x = 2,417,514.71/1,685.78
  6. Step 6: Final answer
    x = 1,434.06

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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.