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Finding the Fourth Proportional to 312,559.08, 431,331.12 and 169,319.76

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Solution

The fourth proportional to 312,559.08, 431,331.12 and 169,319.76 is: 233,661.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,559.08 : 431,331.12 = 169,319.76 : x
  2. Step 2: Convert to fraction form
    312,559.08/431,331.12 = 169,319.76/x
  3. Step 3: Cross multiply
    312,559.08x = 431,331.12 × 169,319.76
  4. Step 4: Simplify right side
    312,559.08x = 73,032,881,718.93
  5. Step 5: Solve for x
    x = 73,032,881,718.93/312,559.08
  6. Step 6: Final answer
    x = 233,661.05

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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.