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Finding the Fourth Proportional to 517.57, 776.66 and 477.47

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Solution

The fourth proportional to 517.57, 776.66 and 477.47 is: 716.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.57 : 776.66 = 477.47 : x
  2. Step 2: Convert to fraction form
    517.57/776.66 = 477.47/x
  3. Step 3: Cross multiply
    517.57x = 776.66 × 477.47
  4. Step 4: Simplify right side
    517.57x = 370,831.40
  5. Step 5: Solve for x
    x = 370,831.40/517.57
  6. Step 6: Final answer
    x = 716.49

Related Problems

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.