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Finding the Fourth Proportional to 390.07, 585.13 and 158.93

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Solution

The fourth proportional to 390.07, 585.13 and 158.93 is: 238.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.07 : 585.13 = 158.93 : x
  2. Step 2: Convert to fraction form
    390.07/585.13 = 158.93/x
  3. Step 3: Cross multiply
    390.07x = 585.13 × 158.93
  4. Step 4: Simplify right side
    390.07x = 92,994.71
  5. Step 5: Solve for x
    x = 92,994.71/390.07
  6. Step 6: Final answer
    x = 238.41

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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.