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Finding the Fourth Proportional to 1,270.24, 1,903.20 and 885.76

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Solution

The fourth proportional to 1,270.24, 1,903.20 and 885.76 is: 1,327.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,270.24 : 1,903.20 = 885.76 : x
  2. Step 2: Convert to fraction form
    1,270.24/1,903.20 = 885.76/x
  3. Step 3: Cross multiply
    1,270.24x = 1,903.20 × 885.76
  4. Step 4: Simplify right side
    1,270.24x = 1,685,778.43
  5. Step 5: Solve for x
    x = 1,685,778.43/1,270.24
  6. Step 6: Final answer
    x = 1,327.13

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1.5x scale

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.