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Finding the Fourth Proportional to 1,044.40, 1,440.80 and 624.32

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Solution

The fourth proportional to 1,044.40, 1,440.80 and 624.32 is: 861.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,044.40 : 1,440.80 = 624.32 : x
  2. Step 2: Convert to fraction form
    1,044.40/1,440.80 = 624.32/x
  3. Step 3: Cross multiply
    1,044.40x = 1,440.80 × 624.32
  4. Step 4: Simplify right side
    1,044.40x = 899,520.26
  5. Step 5: Solve for x
    x = 899,520.26/1,044.40
  6. Step 6: Final answer
    x = 861.28

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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.