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Finding the Fourth Proportional to 432,074.80, 648,112.20 and 265,956.40

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Solution

The fourth proportional to 432,074.80, 648,112.20 and 265,956.40 is: 398,934.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,074.80 : 648,112.20 = 265,956.40 : x
  2. Step 2: Convert to fraction form
    432,074.80/648,112.20 = 265,956.40/x
  3. Step 3: Cross multiply
    432,074.80x = 648,112.20 × 265,956.40
  4. Step 4: Simplify right side
    432,074.80x = 172,369,587,508.08
  5. Step 5: Solve for x
    x = 172,369,587,508.08/432,074.80
  6. Step 6: Final answer
    x = 398,934.60

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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.