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Finding the Fourth Proportional to 402,492.96, 555,404.13 and 221,202.90

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Solution

The fourth proportional to 402,492.96, 555,404.13 and 221,202.90 is: 305,240.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,492.96 : 555,404.13 = 221,202.90 : x
  2. Step 2: Convert to fraction form
    402,492.96/555,404.13 = 221,202.90/x
  3. Step 3: Cross multiply
    402,492.96x = 555,404.13 × 221,202.90
  4. Step 4: Simplify right side
    402,492.96x = 122,857,004,227.98
  5. Step 5: Solve for x
    x = 122,857,004,227.98/402,492.96
  6. Step 6: Final answer
    x = 305,240.13

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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.