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Finding the Fourth Proportional to 923.12, 1,385.16 and 410

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Solution

The fourth proportional to 923.12, 1,385.16 and 410 is: 615.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.12 : 1,385.16 = 410 : x
  2. Step 2: Convert to fraction form
    923.12/1,385.16 = 410/x
  3. Step 3: Cross multiply
    923.12x = 1,385.16 × 410
  4. Step 4: Simplify right side
    923.12x = 567,915.60
  5. Step 5: Solve for x
    x = 567,915.60/923.12
  6. Step 6: Final answer
    x = 615.21

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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.