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Finding the Fourth Proportional to 976.39, 1,347.33 and 556.81

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Solution

The fourth proportional to 976.39, 1,347.33 and 556.81 is: 768.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.39 : 1,347.33 = 556.81 : x
  2. Step 2: Convert to fraction form
    976.39/1,347.33 = 556.81/x
  3. Step 3: Cross multiply
    976.39x = 1,347.33 × 556.81
  4. Step 4: Simplify right side
    976.39x = 750,206.82
  5. Step 5: Solve for x
    x = 750,206.82/976.39
  6. Step 6: Final answer
    x = 768.35

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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.