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Finding the Fourth Proportional to 391,461.51, 540,200.56 and 221,695.64

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Solution

The fourth proportional to 391,461.51, 540,200.56 and 221,695.64 is: 305,930.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,461.51 : 540,200.56 = 221,695.64 : x
  2. Step 2: Convert to fraction form
    391,461.51/540,200.56 = 221,695.64/x
  3. Step 3: Cross multiply
    391,461.51x = 540,200.56 × 221,695.64
  4. Step 4: Simplify right side
    391,461.51x = 119,760,108,063.75
  5. Step 5: Solve for x
    x = 119,760,108,063.75/391,461.51
  6. Step 6: Final answer
    x = 305,930.73

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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.