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Finding the Fourth Proportional to 611.27, 916.47 and 286.46

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Solution

The fourth proportional to 611.27, 916.47 and 286.46 is: 429.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.27 : 916.47 = 286.46 : x
  2. Step 2: Convert to fraction form
    611.27/916.47 = 286.46/x
  3. Step 3: Cross multiply
    611.27x = 916.47 × 286.46
  4. Step 4: Simplify right side
    611.27x = 262,532.00
  5. Step 5: Solve for x
    x = 262,532.00/611.27
  6. Step 6: Final answer
    x = 429.49

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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.