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Finding the Fourth Proportional to 1,158.45, 1,598.75 and 716.59

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Solution

The fourth proportional to 1,158.45, 1,598.75 and 716.59 is: 988.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.45 : 1,598.75 = 716.59 : x
  2. Step 2: Convert to fraction form
    1,158.45/1,598.75 = 716.59/x
  3. Step 3: Cross multiply
    1,158.45x = 1,598.75 × 716.59
  4. Step 4: Simplify right side
    1,158.45x = 1,145,648.26
  5. Step 5: Solve for x
    x = 1,145,648.26/1,158.45
  6. Step 6: Final answer
    x = 988.95

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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.