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Finding the Fourth Proportional to 618.91, 854.06 and 356.92

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Solution

The fourth proportional to 618.91, 854.06 and 356.92 is: 492.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.91 : 854.06 = 356.92 : x
  2. Step 2: Convert to fraction form
    618.91/854.06 = 356.92/x
  3. Step 3: Cross multiply
    618.91x = 854.06 × 356.92
  4. Step 4: Simplify right side
    618.91x = 304,827.18
  5. Step 5: Solve for x
    x = 304,827.18/618.91
  6. Step 6: Final answer
    x = 492.52

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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.