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Finding the Fourth Proportional to 40,650.40, 60,856.80 and 28,986.40

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Solution

The fourth proportional to 40,650.40, 60,856.80 and 28,986.40 is: 43,394.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,650.40 : 60,856.80 = 28,986.40 : x
  2. Step 2: Convert to fraction form
    40,650.40/60,856.80 = 28,986.40/x
  3. Step 3: Cross multiply
    40,650.40x = 60,856.80 × 28,986.40
  4. Step 4: Simplify right side
    40,650.40x = 1,764,019,547.52
  5. Step 5: Solve for x
    x = 1,764,019,547.52/40,650.40
  6. Step 6: Final answer
    x = 43,394.89

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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.