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Finding the Fourth Proportional to 287.19, 430.45 and 150.03

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Solution

The fourth proportional to 287.19, 430.45 and 150.03 is: 224.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.19 : 430.45 = 150.03 : x
  2. Step 2: Convert to fraction form
    287.19/430.45 = 150.03/x
  3. Step 3: Cross multiply
    287.19x = 430.45 × 150.03
  4. Step 4: Simplify right side
    287.19x = 64,580.04
  5. Step 5: Solve for x
    x = 64,580.04/287.19
  6. Step 6: Final answer
    x = 224.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.