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Finding the Fourth Proportional to 478.07, 716.54 and 247.07

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Solution

The fourth proportional to 478.07, 716.54 and 247.07 is: 370.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.07 : 716.54 = 247.07 : x
  2. Step 2: Convert to fraction form
    478.07/716.54 = 247.07/x
  3. Step 3: Cross multiply
    478.07x = 716.54 × 247.07
  4. Step 4: Simplify right side
    478.07x = 177,030.72
  5. Step 5: Solve for x
    x = 177,030.72/478.07
  6. Step 6: Final answer
    x = 370.30

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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.