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Finding the Fourth Proportional to 705.39, 972.27 and 646.56

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Solution

The fourth proportional to 705.39, 972.27 and 646.56 is: 891.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.39 : 972.27 = 646.56 : x
  2. Step 2: Convert to fraction form
    705.39/972.27 = 646.56/x
  3. Step 3: Cross multiply
    705.39x = 972.27 × 646.56
  4. Step 4: Simplify right side
    705.39x = 628,630.89
  5. Step 5: Solve for x
    x = 628,630.89/705.39
  6. Step 6: Final answer
    x = 891.18

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Half scale
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Double scale
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1.5x scale

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.