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Finding the Fourth Proportional to 288.44, 430.90 and 283.32

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Solution

The fourth proportional to 288.44, 430.90 and 283.32 is: 423.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.44 : 430.90 = 283.32 : x
  2. Step 2: Convert to fraction form
    288.44/430.90 = 283.32/x
  3. Step 3: Cross multiply
    288.44x = 430.90 × 283.32
  4. Step 4: Simplify right side
    288.44x = 122,082.59
  5. Step 5: Solve for x
    x = 122,082.59/288.44
  6. Step 6: Final answer
    x = 423.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.