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Finding the Fourth Proportional to 611.32, 916.36 and 538.42

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Solution

The fourth proportional to 611.32, 916.36 and 538.42 is: 807.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.32 : 916.36 = 538.42 : x
  2. Step 2: Convert to fraction form
    611.32/916.36 = 538.42/x
  3. Step 3: Cross multiply
    611.32x = 916.36 × 538.42
  4. Step 4: Simplify right side
    611.32x = 493,386.55
  5. Step 5: Solve for x
    x = 493,386.55/611.32
  6. Step 6: Final answer
    x = 807.08

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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.