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Finding the Fourth Proportional to 40,819.20, 61,228.80 and 40,430.40

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Solution

The fourth proportional to 40,819.20, 61,228.80 and 40,430.40 is: 60,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,819.20 : 61,228.80 = 40,430.40 : x
  2. Step 2: Convert to fraction form
    40,819.20/61,228.80 = 40,430.40/x
  3. Step 3: Cross multiply
    40,819.20x = 61,228.80 × 40,430.40
  4. Step 4: Simplify right side
    40,819.20x = 2,475,504,875.52
  5. Step 5: Solve for x
    x = 2,475,504,875.52/40,819.20
  6. Step 6: Final answer
    x = 60,645.60

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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.