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Finding the Fourth Proportional to 923.84, 1,385.61 and 307.43

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Solution

The fourth proportional to 923.84, 1,385.61 and 307.43 is: 461.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.84 : 1,385.61 = 307.43 : x
  2. Step 2: Convert to fraction form
    923.84/1,385.61 = 307.43/x
  3. Step 3: Cross multiply
    923.84x = 1,385.61 × 307.43
  4. Step 4: Simplify right side
    923.84x = 425,975.20
  5. Step 5: Solve for x
    x = 425,975.20/923.84
  6. Step 6: Final answer
    x = 461.09

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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.