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Finding the Fourth Proportional to 1,158.17, 1,598.15 and 660.77

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Solution

The fourth proportional to 1,158.17, 1,598.15 and 660.77 is: 911.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.17 : 1,598.15 = 660.77 : x
  2. Step 2: Convert to fraction form
    1,158.17/1,598.15 = 660.77/x
  3. Step 3: Cross multiply
    1,158.17x = 1,598.15 × 660.77
  4. Step 4: Simplify right side
    1,158.17x = 1,056,003.24
  5. Step 5: Solve for x
    x = 1,056,003.24/1,158.17
  6. Step 6: Final answer
    x = 911.78

Related Problems

Find fourth proportional to 579.09, 799.08 and 330.38
Half scale
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Double scale
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Similar ratio
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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.