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Finding the Fourth Proportional to 312,089.04, 431,123.78 and 248,345.28

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Solution

The fourth proportional to 312,089.04, 431,123.78 and 248,345.28 is: 343,067.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,089.04 : 431,123.78 = 248,345.28 : x
  2. Step 2: Convert to fraction form
    312,089.04/431,123.78 = 248,345.28/x
  3. Step 3: Cross multiply
    312,089.04x = 431,123.78 × 248,345.28
  4. Step 4: Simplify right side
    312,089.04x = 107,067,555,858.76
  5. Step 5: Solve for x
    x = 107,067,555,858.76/312,089.04
  6. Step 6: Final answer
    x = 343,067.34

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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.