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Finding the Fourth Proportional to 312,543.55, 431,310.07 and 169,303.56

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Solution

The fourth proportional to 312,543.55, 431,310.07 and 169,303.56 is: 233,638.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,543.55 : 431,310.07 = 169,303.56 : x
  2. Step 2: Convert to fraction form
    312,543.55/431,310.07 = 169,303.56/x
  3. Step 3: Cross multiply
    312,543.55x = 431,310.07 × 169,303.56
  4. Step 4: Simplify right side
    312,543.55x = 73,022,330,314.85
  5. Step 5: Solve for x
    x = 73,022,330,314.85/312,543.55
  6. Step 6: Final answer
    x = 233,638.90

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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.