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Finding the Fourth Proportional to 430.08, 592.80 and 326.40

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Solution

The fourth proportional to 430.08, 592.80 and 326.40 is: 449.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.08 : 592.80 = 326.40 : x
  2. Step 2: Convert to fraction form
    430.08/592.80 = 326.40/x
  3. Step 3: Cross multiply
    430.08x = 592.80 × 326.40
  4. Step 4: Simplify right side
    430.08x = 193,489.92
  5. Step 5: Solve for x
    x = 193,489.92/430.08
  6. Step 6: Final answer
    x = 449.89

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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.