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Finding the Fourth Proportional to 845.93, 1,266.66 and 615.35

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Solution

The fourth proportional to 845.93, 1,266.66 and 615.35 is: 921.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.93 : 1,266.66 = 615.35 : x
  2. Step 2: Convert to fraction form
    845.93/1,266.66 = 615.35/x
  3. Step 3: Cross multiply
    845.93x = 1,266.66 × 615.35
  4. Step 4: Simplify right side
    845.93x = 779,432.90
  5. Step 5: Solve for x
    x = 779,432.90/845.93
  6. Step 6: Final answer
    x = 921.40

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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.