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Finding the Fourth Proportional to 1,356.24, 2,031.64 and 624.80

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Solution

The fourth proportional to 1,356.24, 2,031.64 and 624.80 is: 935.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.24 : 2,031.64 = 624.80 : x
  2. Step 2: Convert to fraction form
    1,356.24/2,031.64 = 624.80/x
  3. Step 3: Cross multiply
    1,356.24x = 2,031.64 × 624.80
  4. Step 4: Simplify right side
    1,356.24x = 1,269,368.67
  5. Step 5: Solve for x
    x = 1,269,368.67/1,356.24
  6. Step 6: Final answer
    x = 935.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.