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Finding the Fourth Proportional to 507, 759.42 and 478.60

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Solution

The fourth proportional to 507, 759.42 and 478.60 is: 716.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    507 : 759.42 = 478.60 : x
  2. Step 2: Convert to fraction form
    507/759.42 = 478.60/x
  3. Step 3: Cross multiply
    507x = 759.42 × 478.60
  4. Step 4: Simplify right side
    507x = 363,458.41
  5. Step 5: Solve for x
    x = 363,458.41/507
  6. Step 6: Final answer
    x = 716.88

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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.