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Finding the Fourth Proportional to 287.24, 430.47 and 133.02

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Solution

The fourth proportional to 287.24, 430.47 and 133.02 is: 199.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.24 : 430.47 = 133.02 : x
  2. Step 2: Convert to fraction form
    287.24/430.47 = 133.02/x
  3. Step 3: Cross multiply
    287.24x = 430.47 × 133.02
  4. Step 4: Simplify right side
    287.24x = 57,261.12
  5. Step 5: Solve for x
    x = 57,261.12/287.24
  6. Step 6: Final answer
    x = 199.35

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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.