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Finding the Fourth Proportional to 976.74, 1,347.72 and 583.68

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Solution

The fourth proportional to 976.74, 1,347.72 and 583.68 is: 805.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.74 : 1,347.72 = 583.68 : x
  2. Step 2: Convert to fraction form
    976.74/1,347.72 = 583.68/x
  3. Step 3: Cross multiply
    976.74x = 1,347.72 × 583.68
  4. Step 4: Simplify right side
    976.74x = 786,637.21
  5. Step 5: Solve for x
    x = 786,637.21/976.74
  6. Step 6: Final answer
    x = 805.37

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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.