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Finding the Fourth Proportional to 1,264.11, 1,894.51 and 647.29

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Solution

The fourth proportional to 1,264.11, 1,894.51 and 647.29 is: 970.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.11 : 1,894.51 = 647.29 : x
  2. Step 2: Convert to fraction form
    1,264.11/1,894.51 = 647.29/x
  3. Step 3: Cross multiply
    1,264.11x = 1,894.51 × 647.29
  4. Step 4: Simplify right side
    1,264.11x = 1,226,297.38
  5. Step 5: Solve for x
    x = 1,226,297.38/1,264.11
  6. Step 6: Final answer
    x = 970.09

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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.