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Finding the Fourth Proportional to 390.07, 584.60 and 348.70

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Solution

The fourth proportional to 390.07, 584.60 and 348.70 is: 522.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.07 : 584.60 = 348.70 : x
  2. Step 2: Convert to fraction form
    390.07/584.60 = 348.70/x
  3. Step 3: Cross multiply
    390.07x = 584.60 × 348.70
  4. Step 4: Simplify right side
    390.07x = 203,848.23
  5. Step 5: Solve for x
    x = 203,848.23/390.07
  6. Step 6: Final answer
    x = 522.59

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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.