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Finding the Fourth Proportional to 845.08, 1,165.86 and 513.45

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Solution

The fourth proportional to 845.08, 1,165.86 and 513.45 is: 708.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.08 : 1,165.86 = 513.45 : x
  2. Step 2: Convert to fraction form
    845.08/1,165.86 = 513.45/x
  3. Step 3: Cross multiply
    845.08x = 1,165.86 × 513.45
  4. Step 4: Simplify right side
    845.08x = 598,610.82
  5. Step 5: Solve for x
    x = 598,610.82/845.08
  6. Step 6: Final answer
    x = 708.35

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1.5x scale

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.