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Finding the Fourth Proportional to 1,753.79, 2,420.19 and 997.71

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Solution

The fourth proportional to 1,753.79, 2,420.19 and 997.71 is: 1,376.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,753.79 : 2,420.19 = 997.71 : x
  2. Step 2: Convert to fraction form
    1,753.79/2,420.19 = 997.71/x
  3. Step 3: Cross multiply
    1,753.79x = 2,420.19 × 997.71
  4. Step 4: Simplify right side
    1,753.79x = 2,414,647.76
  5. Step 5: Solve for x
    x = 2,414,647.76/1,753.79
  6. Step 6: Final answer
    x = 1,376.82

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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.