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Finding the Fourth Proportional to 390.50, 585.76 and 101.94

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Solution

The fourth proportional to 390.50, 585.76 and 101.94 is: 152.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.50 : 585.76 = 101.94 : x
  2. Step 2: Convert to fraction form
    390.50/585.76 = 101.94/x
  3. Step 3: Cross multiply
    390.50x = 585.76 × 101.94
  4. Step 4: Simplify right side
    390.50x = 59,712.37
  5. Step 5: Solve for x
    x = 59,712.37/390.50
  6. Step 6: Final answer
    x = 152.91

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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.