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Finding the Fourth Proportional to 1,488.71, 2,230.70 and 1,256.51

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Solution

The fourth proportional to 1,488.71, 2,230.70 and 1,256.51 is: 1,882.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.71 : 2,230.70 = 1,256.51 : x
  2. Step 2: Convert to fraction form
    1,488.71/2,230.70 = 1,256.51/x
  3. Step 3: Cross multiply
    1,488.71x = 2,230.70 × 1,256.51
  4. Step 4: Simplify right side
    1,488.71x = 2,802,896.15
  5. Step 5: Solve for x
    x = 2,802,896.15/1,488.71
  6. Step 6: Final answer
    x = 1,882.77

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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.