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Finding the Fourth Proportional to 402,563.95, 555,526.81 and 221,275.82

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Solution

The fourth proportional to 402,563.95, 555,526.81 and 221,275.82 is: 305,354.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,563.95 : 555,526.81 = 221,275.82 : x
  2. Step 2: Convert to fraction form
    402,563.95/555,526.81 = 221,275.82/x
  3. Step 3: Cross multiply
    402,563.95x = 555,526.81 × 221,275.82
  4. Step 4: Simplify right side
    402,563.95x = 122,924,650,414.73
  5. Step 5: Solve for x
    x = 122,924,650,414.73/402,563.95
  6. Step 6: Final answer
    x = 305,354.34

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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.