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Finding the Fourth Proportional to 430.55, 594.17 and 281.21

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Solution

The fourth proportional to 430.55, 594.17 and 281.21 is: 388.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.55 : 594.17 = 281.21 : x
  2. Step 2: Convert to fraction form
    430.55/594.17 = 281.21/x
  3. Step 3: Cross multiply
    430.55x = 594.17 × 281.21
  4. Step 4: Simplify right side
    430.55x = 167,082.17
  5. Step 5: Solve for x
    x = 167,082.17/430.55
  6. Step 6: Final answer
    x = 388.07

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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.