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Finding the Fourth Proportional to 671.02, 1,011.12 and 551.95

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Solution

The fourth proportional to 671.02, 1,011.12 and 551.95 is: 831.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.02 : 1,011.12 = 551.95 : x
  2. Step 2: Convert to fraction form
    671.02/1,011.12 = 551.95/x
  3. Step 3: Cross multiply
    671.02x = 1,011.12 × 551.95
  4. Step 4: Simplify right side
    671.02x = 558,083.09
  5. Step 5: Solve for x
    x = 558,083.09/671.02
  6. Step 6: Final answer
    x = 831.70

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.