Home / 1,507.30-2,079.50-909.97

Finding the Fourth Proportional to 1,507.30, 2,079.50 and 909.97

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Solution

The fourth proportional to 1,507.30, 2,079.50 and 909.97 is: 1,255.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,507.30 : 2,079.50 = 909.97 : x
  2. Step 2: Convert to fraction form
    1,507.30/2,079.50 = 909.97/x
  3. Step 3: Cross multiply
    1,507.30x = 2,079.50 × 909.97
  4. Step 4: Simplify right side
    1,507.30x = 1,892,272.87
  5. Step 5: Solve for x
    x = 1,892,272.87/1,507.30
  6. Step 6: Final answer
    x = 1,255.41

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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.