Home / 1,557.12-2,335.70-402.87

Finding the Fourth Proportional to 1,557.12, 2,335.70 and 402.87

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Solution

The fourth proportional to 1,557.12, 2,335.70 and 402.87 is: 604.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.12 : 2,335.70 = 402.87 : x
  2. Step 2: Convert to fraction form
    1,557.12/2,335.70 = 402.87/x
  3. Step 3: Cross multiply
    1,557.12x = 2,335.70 × 402.87
  4. Step 4: Simplify right side
    1,557.12x = 940,983.46
  5. Step 5: Solve for x
    x = 940,983.46/1,557.12
  6. Step 6: Final answer
    x = 604.31

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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.