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Finding the Fourth Proportional to 288.13, 432.06 and 105.40

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Solution

The fourth proportional to 288.13, 432.06 and 105.40 is: 158.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.13 : 432.06 = 105.40 : x
  2. Step 2: Convert to fraction form
    288.13/432.06 = 105.40/x
  3. Step 3: Cross multiply
    288.13x = 432.06 × 105.40
  4. Step 4: Simplify right side
    288.13x = 45,538.60
  5. Step 5: Solve for x
    x = 45,538.60/288.13
  6. Step 6: Final answer
    x = 158.05

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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.