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Finding the Fourth Proportional to 710.83, 1,066.43 and 300.48

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Solution

The fourth proportional to 710.83, 1,066.43 and 300.48 is: 450.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.83 : 1,066.43 = 300.48 : x
  2. Step 2: Convert to fraction form
    710.83/1,066.43 = 300.48/x
  3. Step 3: Cross multiply
    710.83x = 1,066.43 × 300.48
  4. Step 4: Simplify right side
    710.83x = 320,440.89
  5. Step 5: Solve for x
    x = 320,440.89/710.83
  6. Step 6: Final answer
    x = 450.80

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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.