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Finding the Fourth Proportional to 860.46, 1,187.13 and 580.59

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Solution

The fourth proportional to 860.46, 1,187.13 and 580.59 is: 801.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.46 : 1,187.13 = 580.59 : x
  2. Step 2: Convert to fraction form
    860.46/1,187.13 = 580.59/x
  3. Step 3: Cross multiply
    860.46x = 1,187.13 × 580.59
  4. Step 4: Simplify right side
    860.46x = 689,235.81
  5. Step 5: Solve for x
    x = 689,235.81/860.46
  6. Step 6: Final answer
    x = 801.01

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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.