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Finding the Fourth Proportional to 1,353.60, 1,869.12 and 888.96

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Solution

The fourth proportional to 1,353.60, 1,869.12 and 888.96 is: 1,227.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.60 : 1,869.12 = 888.96 : x
  2. Step 2: Convert to fraction form
    1,353.60/1,869.12 = 888.96/x
  3. Step 3: Cross multiply
    1,353.60x = 1,869.12 × 888.96
  4. Step 4: Simplify right side
    1,353.60x = 1,661,572.92
  5. Step 5: Solve for x
    x = 1,661,572.92/1,353.60
  6. Step 6: Final answer
    x = 1,227.52

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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.