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Finding the Fourth Proportional to 882.76, 1,217.70 and 717.16

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Solution

The fourth proportional to 882.76, 1,217.70 and 717.16 is: 989.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.76 : 1,217.70 = 717.16 : x
  2. Step 2: Convert to fraction form
    882.76/1,217.70 = 717.16/x
  3. Step 3: Cross multiply
    882.76x = 1,217.70 × 717.16
  4. Step 4: Simplify right side
    882.76x = 873,285.73
  5. Step 5: Solve for x
    x = 873,285.73/882.76
  6. Step 6: Final answer
    x = 989.27

Related Problems

Find fourth proportional to 441.38, 608.85 and 358.58
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.