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Finding the Fourth Proportional to 945.06, 1,303.05 and 613.35

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Solution

The fourth proportional to 945.06, 1,303.05 and 613.35 is: 845.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.06 : 1,303.05 = 613.35 : x
  2. Step 2: Convert to fraction form
    945.06/1,303.05 = 613.35/x
  3. Step 3: Cross multiply
    945.06x = 1,303.05 × 613.35
  4. Step 4: Simplify right side
    945.06x = 799,225.72
  5. Step 5: Solve for x
    x = 799,225.72/945.06
  6. Step 6: Final answer
    x = 845.69

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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.