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Finding the Fourth Proportional to 491.36, 738.56 and 286.34

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Solution

The fourth proportional to 491.36, 738.56 and 286.34 is: 430.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.36 : 738.56 = 286.34 : x
  2. Step 2: Convert to fraction form
    491.36/738.56 = 286.34/x
  3. Step 3: Cross multiply
    491.36x = 738.56 × 286.34
  4. Step 4: Simplify right side
    491.36x = 211,479.27
  5. Step 5: Solve for x
    x = 211,479.27/491.36
  6. Step 6: Final answer
    x = 430.40

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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.