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Finding the Fourth Proportional to 1,171.96, 1,617.36 and 674.76

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Solution

The fourth proportional to 1,171.96, 1,617.36 and 674.76 is: 931.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.96 : 1,617.36 = 674.76 : x
  2. Step 2: Convert to fraction form
    1,171.96/1,617.36 = 674.76/x
  3. Step 3: Cross multiply
    1,171.96x = 1,617.36 × 674.76
  4. Step 4: Simplify right side
    1,171.96x = 1,091,329.83
  5. Step 5: Solve for x
    x = 1,091,329.83/1,171.96
  6. Step 6: Final answer
    x = 931.20

Related Problems

Find fourth proportional to 585.98, 808.68 and 337.38
Half scale
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Double scale
Find fourth proportional to 1,172.96, 1,618.74 and 675.76
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.