Home / 1,045.20-1,439.09-887.50

Finding the Fourth Proportional to 1,045.20, 1,439.09 and 887.50

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Solution

The fourth proportional to 1,045.20, 1,439.09 and 887.50 is: 1,221.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.20 : 1,439.09 = 887.50 : x
  2. Step 2: Convert to fraction form
    1,045.20/1,439.09 = 887.50/x
  3. Step 3: Cross multiply
    1,045.20x = 1,439.09 × 887.50
  4. Step 4: Simplify right side
    1,045.20x = 1,277,192.38
  5. Step 5: Solve for x
    x = 1,277,192.38/1,045.20
  6. Step 6: Final answer
    x = 1,221.96

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1.5x scale

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.