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Finding the Fourth Proportional to 971.04, 1,340.04 and 578.24

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Solution

The fourth proportional to 971.04, 1,340.04 and 578.24 is: 797.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.04 : 1,340.04 = 578.24 : x
  2. Step 2: Convert to fraction form
    971.04/1,340.04 = 578.24/x
  3. Step 3: Cross multiply
    971.04x = 1,340.04 × 578.24
  4. Step 4: Simplify right side
    971.04x = 774,864.73
  5. Step 5: Solve for x
    x = 774,864.73/971.04
  6. Step 6: Final answer
    x = 797.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.