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Finding the Fourth Proportional to 1,639.52, 2,459.62 and 907.55

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Solution

The fourth proportional to 1,639.52, 2,459.62 and 907.55 is: 1,361.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.52 : 2,459.62 = 907.55 : x
  2. Step 2: Convert to fraction form
    1,639.52/2,459.62 = 907.55/x
  3. Step 3: Cross multiply
    1,639.52x = 2,459.62 × 907.55
  4. Step 4: Simplify right side
    1,639.52x = 2,232,228.13
  5. Step 5: Solve for x
    x = 2,232,228.13/1,639.52
  6. Step 6: Final answer
    x = 1,361.51

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1.5x scale

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.