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Finding the Fourth Proportional to 710.89, 1,064.90 and 364.21

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Solution

The fourth proportional to 710.89, 1,064.90 and 364.21 is: 545.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.89 : 1,064.90 = 364.21 : x
  2. Step 2: Convert to fraction form
    710.89/1,064.90 = 364.21/x
  3. Step 3: Cross multiply
    710.89x = 1,064.90 × 364.21
  4. Step 4: Simplify right side
    710.89x = 387,847.23
  5. Step 5: Solve for x
    x = 387,847.23/710.89
  6. Step 6: Final answer
    x = 545.58

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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.