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Finding the Fourth Proportional to 1,451.66, 2,179.78 and 907.28

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Solution

The fourth proportional to 1,451.66, 2,179.78 and 907.28 is: 1,362.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,451.66 : 2,179.78 = 907.28 : x
  2. Step 2: Convert to fraction form
    1,451.66/2,179.78 = 907.28/x
  3. Step 3: Cross multiply
    1,451.66x = 2,179.78 × 907.28
  4. Step 4: Simplify right side
    1,451.66x = 1,977,670.80
  5. Step 5: Solve for x
    x = 1,977,670.80/1,451.66
  6. Step 6: Final answer
    x = 1,362.35

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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.