Home / 1,050.18-1,575.50-319.81

Finding the Fourth Proportional to 1,050.18, 1,575.50 and 319.81

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Solution

The fourth proportional to 1,050.18, 1,575.50 and 319.81 is: 479.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.18 : 1,575.50 = 319.81 : x
  2. Step 2: Convert to fraction form
    1,050.18/1,575.50 = 319.81/x
  3. Step 3: Cross multiply
    1,050.18x = 1,575.50 × 319.81
  4. Step 4: Simplify right side
    1,050.18x = 503,860.66
  5. Step 5: Solve for x
    x = 503,860.66/1,050.18
  6. Step 6: Final answer
    x = 479.79

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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.