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Finding the Fourth Proportional to 1,753.78, 2,420.06 and 967.78

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Solution

The fourth proportional to 1,753.78, 2,420.06 and 967.78 is: 1,335.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,753.78 : 2,420.06 = 967.78 : x
  2. Step 2: Convert to fraction form
    1,753.78/2,420.06 = 967.78/x
  3. Step 3: Cross multiply
    1,753.78x = 2,420.06 × 967.78
  4. Step 4: Simplify right side
    1,753.78x = 2,342,085.67
  5. Step 5: Solve for x
    x = 2,342,085.67/1,753.78
  6. Step 6: Final answer
    x = 1,335.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.