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Finding the Fourth Proportional to 629.76, 870.15 and 607.59

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Solution

The fourth proportional to 629.76, 870.15 and 607.59 is: 839.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.76 : 870.15 = 607.59 : x
  2. Step 2: Convert to fraction form
    629.76/870.15 = 607.59/x
  3. Step 3: Cross multiply
    629.76x = 870.15 × 607.59
  4. Step 4: Simplify right side
    629.76x = 528,694.44
  5. Step 5: Solve for x
    x = 528,694.44/629.76
  6. Step 6: Final answer
    x = 839.52

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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.