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Finding the Fourth Proportional to 1,708.94, 2,563.60 and 613.40

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Solution

The fourth proportional to 1,708.94, 2,563.60 and 613.40 is: 920.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,708.94 : 2,563.60 = 613.40 : x
  2. Step 2: Convert to fraction form
    1,708.94/2,563.60 = 613.40/x
  3. Step 3: Cross multiply
    1,708.94x = 2,563.60 × 613.40
  4. Step 4: Simplify right side
    1,708.94x = 1,572,512.24
  5. Step 5: Solve for x
    x = 1,572,512.24/1,708.94
  6. Step 6: Final answer
    x = 920.17

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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.