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Finding the Fourth Proportional to 1,558.71, 2,151 and 860.04

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Solution

The fourth proportional to 1,558.71, 2,151 and 860.04 is: 1,186.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.71 : 2,151 = 860.04 : x
  2. Step 2: Convert to fraction form
    1,558.71/2,151 = 860.04/x
  3. Step 3: Cross multiply
    1,558.71x = 2,151 × 860.04
  4. Step 4: Simplify right side
    1,558.71x = 1,849,946.04
  5. Step 5: Solve for x
    x = 1,849,946.04/1,558.71
  6. Step 6: Final answer
    x = 1,186.84

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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.