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Finding the Fourth Proportional to 668.76, 923.30 and 459.30

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Solution

The fourth proportional to 668.76, 923.30 and 459.30 is: 634.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.76 : 923.30 = 459.30 : x
  2. Step 2: Convert to fraction form
    668.76/923.30 = 459.30/x
  3. Step 3: Cross multiply
    668.76x = 923.30 × 459.30
  4. Step 4: Simplify right side
    668.76x = 424,074.58
  5. Step 5: Solve for x
    x = 424,074.58/668.76
  6. Step 6: Final answer
    x = 634.12

Related Problems

Find fourth proportional to 334.38, 461.65 and 229.65
Half scale
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Double scale
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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.