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Finding the Fourth Proportional to 478.80, 716.76 and 370

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Solution

The fourth proportional to 478.80, 716.76 and 370 is: 553.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.80 : 716.76 = 370 : x
  2. Step 2: Convert to fraction form
    478.80/716.76 = 370/x
  3. Step 3: Cross multiply
    478.80x = 716.76 × 370
  4. Step 4: Simplify right side
    478.80x = 265,201.20
  5. Step 5: Solve for x
    x = 265,201.20/478.80
  6. Step 6: Final answer
    x = 553.89

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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.