Home / 1,091.60-1,637.40-442.16

Finding the Fourth Proportional to 1,091.60, 1,637.40 and 442.16

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Solution

The fourth proportional to 1,091.60, 1,637.40 and 442.16 is: 663.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.60 : 1,637.40 = 442.16 : x
  2. Step 2: Convert to fraction form
    1,091.60/1,637.40 = 442.16/x
  3. Step 3: Cross multiply
    1,091.60x = 1,637.40 × 442.16
  4. Step 4: Simplify right side
    1,091.60x = 723,992.78
  5. Step 5: Solve for x
    x = 723,992.78/1,091.60
  6. Step 6: Final answer
    x = 663.24

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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.