Home / 1,479.18-2,041.12-815.86

Finding the Fourth Proportional to 1,479.18, 2,041.12 and 815.86

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Solution

The fourth proportional to 1,479.18, 2,041.12 and 815.86 is: 1,125.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.18 : 2,041.12 = 815.86 : x
  2. Step 2: Convert to fraction form
    1,479.18/2,041.12 = 815.86/x
  3. Step 3: Cross multiply
    1,479.18x = 2,041.12 × 815.86
  4. Step 4: Simplify right side
    1,479.18x = 1,665,268.16
  5. Step 5: Solve for x
    x = 1,665,268.16/1,479.18
  6. Step 6: Final answer
    x = 1,125.80

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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.