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Finding the Fourth Proportional to 710.02, 1,065.21 and 277.21

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Solution

The fourth proportional to 710.02, 1,065.21 and 277.21 is: 415.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.02 : 1,065.21 = 277.21 : x
  2. Step 2: Convert to fraction form
    710.02/1,065.21 = 277.21/x
  3. Step 3: Cross multiply
    710.02x = 1,065.21 × 277.21
  4. Step 4: Simplify right side
    710.02x = 295,286.86
  5. Step 5: Solve for x
    x = 295,286.86/710.02
  6. Step 6: Final answer
    x = 415.89

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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.