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Finding the Fourth Proportional to 674.46, 930.87 and 555.66

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Solution

The fourth proportional to 674.46, 930.87 and 555.66 is: 766.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.46 : 930.87 = 555.66 : x
  2. Step 2: Convert to fraction form
    674.46/930.87 = 555.66/x
  3. Step 3: Cross multiply
    674.46x = 930.87 × 555.66
  4. Step 4: Simplify right side
    674.46x = 517,247.22
  5. Step 5: Solve for x
    x = 517,247.22/674.46
  6. Step 6: Final answer
    x = 766.91

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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.