Home / 1,050.14-1,575.20-639.39

Finding the Fourth Proportional to 1,050.14, 1,575.20 and 639.39

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Solution

The fourth proportional to 1,050.14, 1,575.20 and 639.39 is: 959.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.14 : 1,575.20 = 639.39 : x
  2. Step 2: Convert to fraction form
    1,050.14/1,575.20 = 639.39/x
  3. Step 3: Cross multiply
    1,050.14x = 1,575.20 × 639.39
  4. Step 4: Simplify right side
    1,050.14x = 1,007,167.13
  5. Step 5: Solve for x
    x = 1,007,167.13/1,050.14
  6. Step 6: Final answer
    x = 959.08

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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.