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Finding the Fourth Proportional to 630.10, 868.80 and 443.62

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Solution

The fourth proportional to 630.10, 868.80 and 443.62 is: 611.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.10 : 868.80 = 443.62 : x
  2. Step 2: Convert to fraction form
    630.10/868.80 = 443.62/x
  3. Step 3: Cross multiply
    630.10x = 868.80 × 443.62
  4. Step 4: Simplify right side
    630.10x = 385,417.06
  5. Step 5: Solve for x
    x = 385,417.06/630.10
  6. Step 6: Final answer
    x = 611.68

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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.