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Finding the Fourth Proportional to 671.77, 930.77 and 657.19

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Solution

The fourth proportional to 671.77, 930.77 and 657.19 is: 910.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.77 : 930.77 = 657.19 : x
  2. Step 2: Convert to fraction form
    671.77/930.77 = 657.19/x
  3. Step 3: Cross multiply
    671.77x = 930.77 × 657.19
  4. Step 4: Simplify right side
    671.77x = 611,691.64
  5. Step 5: Solve for x
    x = 611,691.64/671.77
  6. Step 6: Final answer
    x = 910.57

Related Problems

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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 (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.