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Finding the Fourth Proportional to 402,765.68, 555,797.61 and 221,485.25

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Solution

The fourth proportional to 402,765.68, 555,797.61 and 221,485.25 is: 305,639.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,765.68 : 555,797.61 = 221,485.25 : x
  2. Step 2: Convert to fraction form
    402,765.68/555,797.61 = 221,485.25/x
  3. Step 3: Cross multiply
    402,765.68x = 555,797.61 × 221,485.25
  4. Step 4: Simplify right side
    402,765.68x = 123,100,973,989.75
  5. Step 5: Solve for x
    x = 123,100,973,989.75/402,765.68
  6. Step 6: Final answer
    x = 305,639.18

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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.