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Finding the Fourth Proportional to 1,618.89, 2,428.65 and 578.97

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Solution

The fourth proportional to 1,618.89, 2,428.65 and 578.97 is: 868.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,618.89 : 2,428.65 = 578.97 : x
  2. Step 2: Convert to fraction form
    1,618.89/2,428.65 = 578.97/x
  3. Step 3: Cross multiply
    1,618.89x = 2,428.65 × 578.97
  4. Step 4: Simplify right side
    1,618.89x = 1,406,115.49
  5. Step 5: Solve for x
    x = 1,406,115.49/1,618.89
  6. Step 6: Final answer
    x = 868.57

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1.5x scale

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.