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Finding the Fourth Proportional to 1,503.20, 2,255.88 and 637.76

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Solution

The fourth proportional to 1,503.20, 2,255.88 and 637.76 is: 957.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,503.20 : 2,255.88 = 637.76 : x
  2. Step 2: Convert to fraction form
    1,503.20/2,255.88 = 637.76/x
  3. Step 3: Cross multiply
    1,503.20x = 2,255.88 × 637.76
  4. Step 4: Simplify right side
    1,503.20x = 1,438,710.03
  5. Step 5: Solve for x
    x = 1,438,710.03/1,503.20
  6. Step 6: Final answer
    x = 957.10

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