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Finding the Fourth Proportional to 312,345.41, 431,045.48 and 176,399.80

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Solution

The fourth proportional to 312,345.41, 431,045.48 and 176,399.80 is: 243,436.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,345.41 : 431,045.48 = 176,399.80 : x
  2. Step 2: Convert to fraction form
    312,345.41/431,045.48 = 176,399.80/x
  3. Step 3: Cross multiply
    312,345.41x = 431,045.48 × 176,399.80
  4. Step 4: Simplify right side
    312,345.41x = 76,036,335,826.29
  5. Step 5: Solve for x
    x = 76,036,335,826.29/312,345.41
  6. Step 6: Final answer
    x = 243,436.70

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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.