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Finding the Fourth Proportional to 1,110.76, 1,532.85 and 668.77

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Solution

The fourth proportional to 1,110.76, 1,532.85 and 668.77 is: 922.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.76 : 1,532.85 = 668.77 : x
  2. Step 2: Convert to fraction form
    1,110.76/1,532.85 = 668.77/x
  3. Step 3: Cross multiply
    1,110.76x = 1,532.85 × 668.77
  4. Step 4: Simplify right side
    1,110.76x = 1,025,116.43
  5. Step 5: Solve for x
    x = 1,025,116.43/1,110.76
  6. Step 6: Final answer
    x = 922.90

Related Problems

Find fourth proportional to 555.38, 766.43 and 334.38
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.