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Finding the Fourth Proportional to 710.91, 1,066.77 and 248.79

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Solution

The fourth proportional to 710.91, 1,066.77 and 248.79 is: 373.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.91 : 1,066.77 = 248.79 : x
  2. Step 2: Convert to fraction form
    710.91/1,066.77 = 248.79/x
  3. Step 3: Cross multiply
    710.91x = 1,066.77 × 248.79
  4. Step 4: Simplify right side
    710.91x = 265,399.71
  5. Step 5: Solve for x
    x = 265,399.71/710.91
  6. Step 6: Final answer
    x = 373.32

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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.