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Finding the Fourth Proportional to 1,244.04, 1,715.50 and 870.90

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Solution

The fourth proportional to 1,244.04, 1,715.50 and 870.90 is: 1,200.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.04 : 1,715.50 = 870.90 : x
  2. Step 2: Convert to fraction form
    1,244.04/1,715.50 = 870.90/x
  3. Step 3: Cross multiply
    1,244.04x = 1,715.50 × 870.90
  4. Step 4: Simplify right side
    1,244.04x = 1,494,028.95
  5. Step 5: Solve for x
    x = 1,494,028.95/1,244.04
  6. Step 6: Final answer
    x = 1,200.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.