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Finding the Fourth Proportional to 1,537.02, 2,120.39 and 907.12

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Solution

The fourth proportional to 1,537.02, 2,120.39 and 907.12 is: 1,251.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,537.02 : 2,120.39 = 907.12 : x
  2. Step 2: Convert to fraction form
    1,537.02/2,120.39 = 907.12/x
  3. Step 3: Cross multiply
    1,537.02x = 2,120.39 × 907.12
  4. Step 4: Simplify right side
    1,537.02x = 1,923,448.18
  5. Step 5: Solve for x
    x = 1,923,448.18/1,537.02
  6. Step 6: Final answer
    x = 1,251.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.