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Finding the Fourth Proportional to 675.16, 1,005.95 and 631

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Solution

The fourth proportional to 675.16, 1,005.95 and 631 is: 940.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.16 : 1,005.95 = 631 : x
  2. Step 2: Convert to fraction form
    675.16/1,005.95 = 631/x
  3. Step 3: Cross multiply
    675.16x = 1,005.95 × 631
  4. Step 4: Simplify right side
    675.16x = 634,754.45
  5. Step 5: Solve for x
    x = 634,754.45/675.16
  6. Step 6: Final answer
    x = 940.15

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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.