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Finding the Fourth Proportional to 669.69, 999.56 and 576.74

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Solution

The fourth proportional to 669.69, 999.56 and 576.74 is: 860.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.69 : 999.56 = 576.74 : x
  2. Step 2: Convert to fraction form
    669.69/999.56 = 576.74/x
  3. Step 3: Cross multiply
    669.69x = 999.56 × 576.74
  4. Step 4: Simplify right side
    669.69x = 576,490.18
  5. Step 5: Solve for x
    x = 576,490.18/669.69
  6. Step 6: Final answer
    x = 860.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.