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Finding the Fourth Proportional to 321,330.81, 442,924.96 and 253,238.56

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Solution

The fourth proportional to 321,330.81, 442,924.96 and 253,238.56 is: 349,066.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,330.81 : 442,924.96 = 253,238.56 : x
  2. Step 2: Convert to fraction form
    321,330.81/442,924.96 = 253,238.56/x
  3. Step 3: Cross multiply
    321,330.81x = 442,924.96 × 253,238.56
  4. Step 4: Simplify right side
    321,330.81x = 112,165,679,058.46
  5. Step 5: Solve for x
    x = 112,165,679,058.46/321,330.81
  6. Step 6: Final answer
    x = 349,066.06

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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.