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Finding the Fourth Proportional to 1,276.02, 1,915.38 and 627.21

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Solution

The fourth proportional to 1,276.02, 1,915.38 and 627.21 is: 941.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.02 : 1,915.38 = 627.21 : x
  2. Step 2: Convert to fraction form
    1,276.02/1,915.38 = 627.21/x
  3. Step 3: Cross multiply
    1,276.02x = 1,915.38 × 627.21
  4. Step 4: Simplify right side
    1,276.02x = 1,201,345.49
  5. Step 5: Solve for x
    x = 1,201,345.49/1,276.02
  6. Step 6: Final answer
    x = 941.48

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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.