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Finding the Fourth Proportional to 2,756.49, 4,135.36 and 907.79

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Solution

The fourth proportional to 2,756.49, 4,135.36 and 907.79 is: 1,361.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,756.49 : 4,135.36 = 907.79 : x
  2. Step 2: Convert to fraction form
    2,756.49/4,135.36 = 907.79/x
  3. Step 3: Cross multiply
    2,756.49x = 4,135.36 × 907.79
  4. Step 4: Simplify right side
    2,756.49x = 3,754,038.45
  5. Step 5: Solve for x
    x = 3,754,038.45/2,756.49
  6. Step 6: Final answer
    x = 1,361.89

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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.