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Finding the Fourth Proportional to 670.74, 1,006.26 and 397.04

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Solution

The fourth proportional to 670.74, 1,006.26 and 397.04 is: 595.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.74 : 1,006.26 = 397.04 : x
  2. Step 2: Convert to fraction form
    670.74/1,006.26 = 397.04/x
  3. Step 3: Cross multiply
    670.74x = 1,006.26 × 397.04
  4. Step 4: Simplify right side
    670.74x = 399,525.47
  5. Step 5: Solve for x
    x = 399,525.47/670.74
  6. Step 6: Final answer
    x = 595.65

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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.