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Finding the Fourth Proportional to 1,253.30, 1,881.39 and 870.26

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Solution

The fourth proportional to 1,253.30, 1,881.39 and 870.26 is: 1,306.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.30 : 1,881.39 = 870.26 : x
  2. Step 2: Convert to fraction form
    1,253.30/1,881.39 = 870.26/x
  3. Step 3: Cross multiply
    1,253.30x = 1,881.39 × 870.26
  4. Step 4: Simplify right side
    1,253.30x = 1,637,298.46
  5. Step 5: Solve for x
    x = 1,637,298.46/1,253.30
  6. Step 6: Final answer
    x = 1,306.39

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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.