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Finding the Fourth Proportional to 216,305.13, 298,079.54 and 155,761.48

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Solution

The fourth proportional to 216,305.13, 298,079.54 and 155,761.48 is: 214,647.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,305.13 : 298,079.54 = 155,761.48 : x
  2. Step 2: Convert to fraction form
    216,305.13/298,079.54 = 155,761.48/x
  3. Step 3: Cross multiply
    216,305.13x = 298,079.54 × 155,761.48
  4. Step 4: Simplify right side
    216,305.13x = 46,429,311,362.18
  5. Step 5: Solve for x
    x = 46,429,311,362.18/216,305.13
  6. Step 6: Final answer
    x = 214,647.29

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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.