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Finding the Fourth Proportional to 390.56, 585.88 and 102.02

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Solution

The fourth proportional to 390.56, 585.88 and 102.02 is: 153.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.56 : 585.88 = 102.02 : x
  2. Step 2: Convert to fraction form
    390.56/585.88 = 102.02/x
  3. Step 3: Cross multiply
    390.56x = 585.88 × 102.02
  4. Step 4: Simplify right side
    390.56x = 59,768.29
  5. Step 5: Solve for x
    x = 59,768.29/390.56
  6. Step 6: Final answer
    x = 153.03

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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.