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Finding the Fourth Proportional to 945.02, 1,303.80 and 613.86

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Solution

The fourth proportional to 945.02, 1,303.80 and 613.86 is: 846.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.02 : 1,303.80 = 613.86 : x
  2. Step 2: Convert to fraction form
    945.02/1,303.80 = 613.86/x
  3. Step 3: Cross multiply
    945.02x = 1,303.80 × 613.86
  4. Step 4: Simplify right side
    945.02x = 800,350.67
  5. Step 5: Solve for x
    x = 800,350.67/945.02
  6. Step 6: Final answer
    x = 846.91

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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.