Home / 1,903.18-2,855.40-929.20

Finding the Fourth Proportional to 1,903.18, 2,855.40 and 929.20

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Solution

The fourth proportional to 1,903.18, 2,855.40 and 929.20 is: 1,394.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,903.18 : 2,855.40 = 929.20 : x
  2. Step 2: Convert to fraction form
    1,903.18/2,855.40 = 929.20/x
  3. Step 3: Cross multiply
    1,903.18x = 2,855.40 × 929.20
  4. Step 4: Simplify right side
    1,903.18x = 2,653,237.68
  5. Step 5: Solve for x
    x = 2,653,237.68/1,903.18
  6. Step 6: Final answer
    x = 1,394.11

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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.