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Finding the Fourth Proportional to 312,545.80, 431,314.26 and 169,305.40

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Solution

The fourth proportional to 312,545.80, 431,314.26 and 169,305.40 is: 233,642.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,545.80 : 431,314.26 = 169,305.40 : x
  2. Step 2: Convert to fraction form
    312,545.80/431,314.26 = 169,305.40/x
  3. Step 3: Cross multiply
    312,545.80x = 431,314.26 × 169,305.40
  4. Step 4: Simplify right side
    312,545.80x = 73,023,833,315.00
  5. Step 5: Solve for x
    x = 73,023,833,315.00/312,545.80
  6. Step 6: Final answer
    x = 233,642.02

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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.