Home / 1,542.50-2,128.97-904.86

Finding the Fourth Proportional to 1,542.50, 2,128.97 and 904.86

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Solution

The fourth proportional to 1,542.50, 2,128.97 and 904.86 is: 1,248.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.50 : 2,128.97 = 904.86 : x
  2. Step 2: Convert to fraction form
    1,542.50/2,128.97 = 904.86/x
  3. Step 3: Cross multiply
    1,542.50x = 2,128.97 × 904.86
  4. Step 4: Simplify right side
    1,542.50x = 1,926,415.27
  5. Step 5: Solve for x
    x = 1,926,415.27/1,542.50
  6. Step 6: Final answer
    x = 1,248.90

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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.