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Finding the Fourth Proportional to 312,430.08, 431,150.08 and 169,186.56

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Solution

The fourth proportional to 312,430.08, 431,150.08 and 169,186.56 is: 233,475.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,430.08 : 431,150.08 = 169,186.56 : x
  2. Step 2: Convert to fraction form
    312,430.08/431,150.08 = 169,186.56/x
  3. Step 3: Cross multiply
    312,430.08x = 431,150.08 × 169,186.56
  4. Step 4: Simplify right side
    312,430.08x = 72,944,798,878.92
  5. Step 5: Solve for x
    x = 72,944,798,878.92/312,430.08
  6. Step 6: Final answer
    x = 233,475.60

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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.