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Finding the Fourth Proportional to 1,248.75, 1,723.62 and 717.93

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Solution

The fourth proportional to 1,248.75, 1,723.62 and 717.93 is: 990.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.75 : 1,723.62 = 717.93 : x
  2. Step 2: Convert to fraction form
    1,248.75/1,723.62 = 717.93/x
  3. Step 3: Cross multiply
    1,248.75x = 1,723.62 × 717.93
  4. Step 4: Simplify right side
    1,248.75x = 1,237,438.51
  5. Step 5: Solve for x
    x = 1,237,438.51/1,248.75
  6. Step 6: Final answer
    x = 990.94

Related Problems

Find fourth proportional to 624.38, 861.81 and 358.97
Half scale
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Double scale
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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.