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Finding the Fourth Proportional to 1,618.80, 2,428.29 and 508.38

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Solution

The fourth proportional to 1,618.80, 2,428.29 and 508.38 is: 762.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,618.80 : 2,428.29 = 508.38 : x
  2. Step 2: Convert to fraction form
    1,618.80/2,428.29 = 508.38/x
  3. Step 3: Cross multiply
    1,618.80x = 2,428.29 × 508.38
  4. Step 4: Simplify right side
    1,618.80x = 1,234,494.07
  5. Step 5: Solve for x
    x = 1,234,494.07/1,618.80
  6. Step 6: Final answer
    x = 762.60

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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.