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Finding the Fourth Proportional to 345.70, 521.33 and 307.30

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Solution

The fourth proportional to 345.70, 521.33 and 307.30 is: 463.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.70 : 521.33 = 307.30 : x
  2. Step 2: Convert to fraction form
    345.70/521.33 = 307.30/x
  3. Step 3: Cross multiply
    345.70x = 521.33 × 307.30
  4. Step 4: Simplify right side
    345.70x = 160,204.71
  5. Step 5: Solve for x
    x = 160,204.71/345.70
  6. Step 6: Final answer
    x = 463.42

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.