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Finding the Fourth Proportional to 402,660.31, 555,657.07 and 221,370.93

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Solution

The fourth proportional to 402,660.31, 555,657.07 and 221,370.93 is: 305,484.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,660.31 : 555,657.07 = 221,370.93 : x
  2. Step 2: Convert to fraction form
    402,660.31/555,657.07 = 221,370.93/x
  3. Step 3: Cross multiply
    402,660.31x = 555,657.07 × 221,370.93
  4. Step 4: Simplify right side
    402,660.31x = 123,006,322,346.98
  5. Step 5: Solve for x
    x = 123,006,322,346.98/402,660.31
  6. Step 6: Final answer
    x = 305,484.10

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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.