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Finding the Fourth Proportional to 910.02, 1,256.25 and 615.76

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Solution

The fourth proportional to 910.02, 1,256.25 and 615.76 is: 850.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.02 : 1,256.25 = 615.76 : x
  2. Step 2: Convert to fraction form
    910.02/1,256.25 = 615.76/x
  3. Step 3: Cross multiply
    910.02x = 1,256.25 × 615.76
  4. Step 4: Simplify right side
    910.02x = 773,548.50
  5. Step 5: Solve for x
    x = 773,548.50/910.02
  6. Step 6: Final answer
    x = 850.04

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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.