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Finding the Fourth Proportional to 315,949.55, 435,879.83 and 220,512.11

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Solution

The fourth proportional to 315,949.55, 435,879.83 and 220,512.11 is: 304,215.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,949.55 : 435,879.83 = 220,512.11 : x
  2. Step 2: Convert to fraction form
    315,949.55/435,879.83 = 220,512.11/x
  3. Step 3: Cross multiply
    315,949.55x = 435,879.83 × 220,512.11
  4. Step 4: Simplify right side
    315,949.55x = 96,116,779,391.62
  5. Step 5: Solve for x
    x = 96,116,779,391.62/315,949.55
  6. Step 6: Final answer
    x = 304,215.60

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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.