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Finding the Fourth Proportional to 478.26, 715.94 and 356.22

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Solution

The fourth proportional to 478.26, 715.94 and 356.22 is: 533.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.26 : 715.94 = 356.22 : x
  2. Step 2: Convert to fraction form
    478.26/715.94 = 356.22/x
  3. Step 3: Cross multiply
    478.26x = 715.94 × 356.22
  4. Step 4: Simplify right side
    478.26x = 255,030.37
  5. Step 5: Solve for x
    x = 255,030.37/478.26
  6. Step 6: Final answer
    x = 533.25

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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.