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Finding the Fourth Proportional to 1,003.41, 1,384.88 and 630.70

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Solution

The fourth proportional to 1,003.41, 1,384.88 and 630.70 is: 870.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.41 : 1,384.88 = 630.70 : x
  2. Step 2: Convert to fraction form
    1,003.41/1,384.88 = 630.70/x
  3. Step 3: Cross multiply
    1,003.41x = 1,384.88 × 630.70
  4. Step 4: Simplify right side
    1,003.41x = 873,440.66
  5. Step 5: Solve for x
    x = 873,440.66/1,003.41
  6. Step 6: Final answer
    x = 870.47

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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.