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Finding the Fourth Proportional to 713.09, 984.47 and 555.81

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Solution

The fourth proportional to 713.09, 984.47 and 555.81 is: 767.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.09 : 984.47 = 555.81 : x
  2. Step 2: Convert to fraction form
    713.09/984.47 = 555.81/x
  3. Step 3: Cross multiply
    713.09x = 984.47 × 555.81
  4. Step 4: Simplify right side
    713.09x = 547,175.49
  5. Step 5: Solve for x
    x = 547,175.49/713.09
  6. Step 6: Final answer
    x = 767.34

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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.