Home / 1,335.60-1,998.81-921.96

Finding the Fourth Proportional to 1,335.60, 1,998.81 and 921.96

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Solution

The fourth proportional to 1,335.60, 1,998.81 and 921.96 is: 1,379.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.60 : 1,998.81 = 921.96 : x
  2. Step 2: Convert to fraction form
    1,335.60/1,998.81 = 921.96/x
  3. Step 3: Cross multiply
    1,335.60x = 1,998.81 × 921.96
  4. Step 4: Simplify right side
    1,335.60x = 1,842,822.87
  5. Step 5: Solve for x
    x = 1,842,822.87/1,335.60
  6. Step 6: Final answer
    x = 1,379.77

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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.