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Finding the Fourth Proportional to 671.07, 1,006.61 and 555.30

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Solution

The fourth proportional to 671.07, 1,006.61 and 555.30 is: 832.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.07 : 1,006.61 = 555.30 : x
  2. Step 2: Convert to fraction form
    671.07/1,006.61 = 555.30/x
  3. Step 3: Cross multiply
    671.07x = 1,006.61 × 555.30
  4. Step 4: Simplify right side
    671.07x = 558,967.76
  5. Step 5: Solve for x
    x = 558,967.76/671.07
  6. Step 6: Final answer
    x = 832.95

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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.