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Finding the Fourth Proportional to 917.81, 1,266.21 and 524.75

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Solution

The fourth proportional to 917.81, 1,266.21 and 524.75 is: 723.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.81 : 1,266.21 = 524.75 : x
  2. Step 2: Convert to fraction form
    917.81/1,266.21 = 524.75/x
  3. Step 3: Cross multiply
    917.81x = 1,266.21 × 524.75
  4. Step 4: Simplify right side
    917.81x = 664,443.70
  5. Step 5: Solve for x
    x = 664,443.70/917.81
  6. Step 6: Final answer
    x = 723.94

Related Problems

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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.