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Finding the Fourth Proportional to 705.84, 971.64 and 611.30

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Solution

The fourth proportional to 705.84, 971.64 and 611.30 is: 841.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.84 : 971.64 = 611.30 : x
  2. Step 2: Convert to fraction form
    705.84/971.64 = 611.30/x
  3. Step 3: Cross multiply
    705.84x = 971.64 × 611.30
  4. Step 4: Simplify right side
    705.84x = 593,963.53
  5. Step 5: Solve for x
    x = 593,963.53/705.84
  6. Step 6: Final answer
    x = 841.50

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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.