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Finding the Fourth Proportional to 700.40, 1,049.91 and 261.51

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Solution

The fourth proportional to 700.40, 1,049.91 and 261.51 is: 392.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.40 : 1,049.91 = 261.51 : x
  2. Step 2: Convert to fraction form
    700.40/1,049.91 = 261.51/x
  3. Step 3: Cross multiply
    700.40x = 1,049.91 × 261.51
  4. Step 4: Simplify right side
    700.40x = 274,561.96
  5. Step 5: Solve for x
    x = 274,561.96/700.40
  6. Step 6: Final answer
    x = 392.01

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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.