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Finding the Fourth Proportional to 1,244.75, 1,717.95 and 747.67

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Solution

The fourth proportional to 1,244.75, 1,717.95 and 747.67 is: 1,031.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.75 : 1,717.95 = 747.67 : x
  2. Step 2: Convert to fraction form
    1,244.75/1,717.95 = 747.67/x
  3. Step 3: Cross multiply
    1,244.75x = 1,717.95 × 747.67
  4. Step 4: Simplify right side
    1,244.75x = 1,284,453.73
  5. Step 5: Solve for x
    x = 1,284,453.73/1,244.75
  6. Step 6: Final answer
    x = 1,031.89

Related Problems

Find fourth proportional to 622.38, 858.97 and 373.83
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.