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Finding the Fourth Proportional to 444.15, 611.35 and 312.93

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Solution

The fourth proportional to 444.15, 611.35 and 312.93 is: 430.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.15 : 611.35 = 312.93 : x
  2. Step 2: Convert to fraction form
    444.15/611.35 = 312.93/x
  3. Step 3: Cross multiply
    444.15x = 611.35 × 312.93
  4. Step 4: Simplify right side
    444.15x = 191,308.97
  5. Step 5: Solve for x
    x = 191,308.97/444.15
  6. Step 6: Final answer
    x = 430.73

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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.