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Finding the Fourth Proportional to 2,342.79, 3,513.57 and 698.90

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Solution

The fourth proportional to 2,342.79, 3,513.57 and 698.90 is: 1,048.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,342.79 : 3,513.57 = 698.90 : x
  2. Step 2: Convert to fraction form
    2,342.79/3,513.57 = 698.90/x
  3. Step 3: Cross multiply
    2,342.79x = 3,513.57 × 698.90
  4. Step 4: Simplify right side
    2,342.79x = 2,455,616.51
  5. Step 5: Solve for x
    x = 2,455,616.51/2,342.79
  6. Step 6: Final answer
    x = 1,048.16

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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.