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Finding the Fourth Proportional to 710.54, 1,065.85 and 277.66

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Solution

The fourth proportional to 710.54, 1,065.85 and 277.66 is: 416.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.54 : 1,065.85 = 277.66 : x
  2. Step 2: Convert to fraction form
    710.54/1,065.85 = 277.66/x
  3. Step 3: Cross multiply
    710.54x = 1,065.85 × 277.66
  4. Step 4: Simplify right side
    710.54x = 295,943.91
  5. Step 5: Solve for x
    x = 295,943.91/710.54
  6. Step 6: Final answer
    x = 416.51

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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.