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Finding the Fourth Proportional to 312,412.95, 431,131.91 and 169,173.00

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Solution

The fourth proportional to 312,412.95, 431,131.91 and 169,173.00 is: 233,459.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,412.95 : 431,131.91 = 169,173.00 : x
  2. Step 2: Convert to fraction form
    312,412.95/431,131.91 = 169,173.00/x
  3. Step 3: Cross multiply
    312,412.95x = 431,131.91 × 169,173.00
  4. Step 4: Simplify right side
    312,412.95x = 72,935,876,877.70
  5. Step 5: Solve for x
    x = 72,935,876,877.70/312,412.95
  6. Step 6: Final answer
    x = 233,459.84

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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.