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Finding the Fourth Proportional to 345.20, 515.36 and 296.46

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Solution

The fourth proportional to 345.20, 515.36 and 296.46 is: 442.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.20 : 515.36 = 296.46 : x
  2. Step 2: Convert to fraction form
    345.20/515.36 = 296.46/x
  3. Step 3: Cross multiply
    345.20x = 515.36 × 296.46
  4. Step 4: Simplify right side
    345.20x = 152,784.37
  5. Step 5: Solve for x
    x = 152,784.37/345.20
  6. Step 6: Final answer
    x = 442.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.