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Finding the Fourth Proportional to 923.71, 1,385.27 and 307.25

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Solution

The fourth proportional to 923.71, 1,385.27 and 307.25 is: 460.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.71 : 1,385.27 = 307.25 : x
  2. Step 2: Convert to fraction form
    923.71/1,385.27 = 307.25/x
  3. Step 3: Cross multiply
    923.71x = 1,385.27 × 307.25
  4. Step 4: Simplify right side
    923.71x = 425,624.21
  5. Step 5: Solve for x
    x = 425,624.21/923.71
  6. Step 6: Final answer
    x = 460.78

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.