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Finding the Fourth Proportional to 687.00, 948.12 and 392.29

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Solution

The fourth proportional to 687.00, 948.12 and 392.29 is: 541.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.00 : 948.12 = 392.29 : x
  2. Step 2: Convert to fraction form
    687.00/948.12 = 392.29/x
  3. Step 3: Cross multiply
    687.00x = 948.12 × 392.29
  4. Step 4: Simplify right side
    687.00x = 371,934.15
  5. Step 5: Solve for x
    x = 371,934.15/687.00
  6. Step 6: Final answer
    x = 541.39

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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.