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Finding the Fourth Proportional to 288.63, 430.27 and 284.18

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Solution

The fourth proportional to 288.63, 430.27 and 284.18 is: 423.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.63 : 430.27 = 284.18 : x
  2. Step 2: Convert to fraction form
    288.63/430.27 = 284.18/x
  3. Step 3: Cross multiply
    288.63x = 430.27 × 284.18
  4. Step 4: Simplify right side
    288.63x = 122,271.27
  5. Step 5: Solve for x
    x = 122,271.27/288.63
  6. Step 6: Final answer
    x = 423.63

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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.