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Finding the Fourth Proportional to 3,718.64, 5,578.68 and 1,870.16

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Solution

The fourth proportional to 3,718.64, 5,578.68 and 1,870.16 is: 2,805.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,718.64 : 5,578.68 = 1,870.16 : x
  2. Step 2: Convert to fraction form
    3,718.64/5,578.68 = 1,870.16/x
  3. Step 3: Cross multiply
    3,718.64x = 5,578.68 × 1,870.16
  4. Step 4: Simplify right side
    3,718.64x = 10,433,024.19
  5. Step 5: Solve for x
    x = 10,433,024.19/3,718.64
  6. Step 6: Final answer
    x = 2,805.60

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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.