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Finding the Fourth Proportional to 312,607.20, 431,397.36 and 169,370.88

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Solution

The fourth proportional to 312,607.20, 431,397.36 and 169,370.88 is: 233,731.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,607.20 : 431,397.36 = 169,370.88 : x
  2. Step 2: Convert to fraction form
    312,607.20/431,397.36 = 169,370.88/x
  3. Step 3: Cross multiply
    312,607.20x = 431,397.36 × 169,370.88
  4. Step 4: Simplify right side
    312,607.20x = 73,066,150,492.88
  5. Step 5: Solve for x
    x = 73,066,150,492.88/312,607.20
  6. Step 6: Final answer
    x = 233,731.50

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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.