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Finding the Fourth Proportional to 1,578.66, 2,368.50 and 1,031.91

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Solution

The fourth proportional to 1,578.66, 2,368.50 and 1,031.91 is: 1,548.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.66 : 2,368.50 = 1,031.91 : x
  2. Step 2: Convert to fraction form
    1,578.66/2,368.50 = 1,031.91/x
  3. Step 3: Cross multiply
    1,578.66x = 2,368.50 × 1,031.91
  4. Step 4: Simplify right side
    1,578.66x = 2,444,078.84
  5. Step 5: Solve for x
    x = 2,444,078.84/1,578.66
  6. Step 6: Final answer
    x = 1,548.20

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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.