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Finding the Fourth Proportional to 1,558.75, 2,151.08 and 860.17

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Solution

The fourth proportional to 1,558.75, 2,151.08 and 860.17 is: 1,187.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.75 : 2,151.08 = 860.17 : x
  2. Step 2: Convert to fraction form
    1,558.75/2,151.08 = 860.17/x
  3. Step 3: Cross multiply
    1,558.75x = 2,151.08 × 860.17
  4. Step 4: Simplify right side
    1,558.75x = 1,850,294.48
  5. Step 5: Solve for x
    x = 1,850,294.48/1,558.75
  6. Step 6: Final answer
    x = 1,187.04

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1.5x scale

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.