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Finding the Fourth Proportional to 1,307, 1,961.40 and 537.50

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Solution

The fourth proportional to 1,307, 1,961.40 and 537.50 is: 806.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,307 : 1,961.40 = 537.50 : x
  2. Step 2: Convert to fraction form
    1,307/1,961.40 = 537.50/x
  3. Step 3: Cross multiply
    1,307x = 1,961.40 × 537.50
  4. Step 4: Simplify right side
    1,307x = 1,054,252.50
  5. Step 5: Solve for x
    x = 1,054,252.50/1,307
  6. Step 6: Final answer
    x = 806.62

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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.