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Finding the Fourth Proportional to 945, 1,303.26 and 613.11

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Solution

The fourth proportional to 945, 1,303.26 and 613.11 is: 845.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    945 : 1,303.26 = 613.11 : x
  2. Step 2: Convert to fraction form
    945/1,303.26 = 613.11/x
  3. Step 3: Cross multiply
    945x = 1,303.26 × 613.11
  4. Step 4: Simplify right side
    945x = 799,041.74
  5. Step 5: Solve for x
    x = 799,041.74/945
  6. Step 6: Final answer
    x = 845.55

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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.