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Finding the Fourth Proportional to 868.02, 1,196.13 and 631.58

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Solution

The fourth proportional to 868.02, 1,196.13 and 631.58 is: 870.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.02 : 1,196.13 = 631.58 : x
  2. Step 2: Convert to fraction form
    868.02/1,196.13 = 631.58/x
  3. Step 3: Cross multiply
    868.02x = 1,196.13 × 631.58
  4. Step 4: Simplify right side
    868.02x = 755,451.79
  5. Step 5: Solve for x
    x = 755,451.79/868.02
  6. Step 6: Final answer
    x = 870.32

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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.