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Finding the Fourth Proportional to 430.61, 594.21 and 255.95

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Solution

The fourth proportional to 430.61, 594.21 and 255.95 is: 353.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.61 : 594.21 = 255.95 : x
  2. Step 2: Convert to fraction form
    430.61/594.21 = 255.95/x
  3. Step 3: Cross multiply
    430.61x = 594.21 × 255.95
  4. Step 4: Simplify right side
    430.61x = 152,089.54
  5. Step 5: Solve for x
    x = 152,089.54/430.61
  6. Step 6: Final answer
    x = 353.19

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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.