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Finding the Fourth Proportional to 402,771.15, 555,832.67 and 221,490.72

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Solution

The fourth proportional to 402,771.15, 555,832.67 and 221,490.72 is: 305,661.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,771.15 : 555,832.67 = 221,490.72 : x
  2. Step 2: Convert to fraction form
    402,771.15/555,832.67 = 221,490.72/x
  3. Step 3: Cross multiply
    402,771.15x = 555,832.67 × 221,490.72
  4. Step 4: Simplify right side
    402,771.15x = 123,111,777,170.37
  5. Step 5: Solve for x
    x = 123,111,777,170.37/402,771.15
  6. Step 6: Final answer
    x = 305,661.86

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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.