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Finding the Fourth Proportional to 2,658.96, 3,987.36 and 903.48

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Solution

The fourth proportional to 2,658.96, 3,987.36 and 903.48 is: 1,354.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.96 : 3,987.36 = 903.48 : x
  2. Step 2: Convert to fraction form
    2,658.96/3,987.36 = 903.48/x
  3. Step 3: Cross multiply
    2,658.96x = 3,987.36 × 903.48
  4. Step 4: Simplify right side
    2,658.96x = 3,602,500.01
  5. Step 5: Solve for x
    x = 3,602,500.01/2,658.96
  6. Step 6: Final answer
    x = 1,354.85

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1.5x scale

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.