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Finding the Fourth Proportional to 1,617.49, 2,426.70 and 693.10

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Solution

The fourth proportional to 1,617.49, 2,426.70 and 693.10 is: 1,039.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.49 : 2,426.70 = 693.10 : x
  2. Step 2: Convert to fraction form
    1,617.49/2,426.70 = 693.10/x
  3. Step 3: Cross multiply
    1,617.49x = 2,426.70 × 693.10
  4. Step 4: Simplify right side
    1,617.49x = 1,681,945.77
  5. Step 5: Solve for x
    x = 1,681,945.77/1,617.49
  6. Step 6: Final answer
    x = 1,039.85

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1.5x scale

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.