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Finding the Fourth Proportional to 615.54, 916.53 and 611.22

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Solution

The fourth proportional to 615.54, 916.53 and 611.22 is: 910.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.54 : 916.53 = 611.22 : x
  2. Step 2: Convert to fraction form
    615.54/916.53 = 611.22/x
  3. Step 3: Cross multiply
    615.54x = 916.53 × 611.22
  4. Step 4: Simplify right side
    615.54x = 560,201.47
  5. Step 5: Solve for x
    x = 560,201.47/615.54
  6. Step 6: Final answer
    x = 910.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.