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Finding the Fourth Proportional to 1,417.68, 2,124.90 and 870.26

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Solution

The fourth proportional to 1,417.68, 2,124.90 and 870.26 is: 1,304.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.68 : 2,124.90 = 870.26 : x
  2. Step 2: Convert to fraction form
    1,417.68/2,124.90 = 870.26/x
  3. Step 3: Cross multiply
    1,417.68x = 2,124.90 × 870.26
  4. Step 4: Simplify right side
    1,417.68x = 1,849,204.85
  5. Step 5: Solve for x
    x = 1,849,204.85/1,417.68
  6. Step 6: Final answer
    x = 1,304.39

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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.