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Finding the Fourth Proportional to 699.69, 1,047.48 and 424.95

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Solution

The fourth proportional to 699.69, 1,047.48 and 424.95 is: 636.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.69 : 1,047.48 = 424.95 : x
  2. Step 2: Convert to fraction form
    699.69/1,047.48 = 424.95/x
  3. Step 3: Cross multiply
    699.69x = 1,047.48 × 424.95
  4. Step 4: Simplify right side
    699.69x = 445,126.63
  5. Step 5: Solve for x
    x = 445,126.63/699.69
  6. Step 6: Final answer
    x = 636.18

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.