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Finding the Fourth Proportional to 402,708.42, 555,739.72 and 221,432.03

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Solution

The fourth proportional to 402,708.42, 555,739.72 and 221,432.03 is: 305,577.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,708.42 : 555,739.72 = 221,432.03 : x
  2. Step 2: Convert to fraction form
    402,708.42/555,739.72 = 221,432.03/x
  3. Step 3: Cross multiply
    402,708.42x = 555,739.72 × 221,432.03
  4. Step 4: Simplify right side
    402,708.42x = 123,058,574,351.23
  5. Step 5: Solve for x
    x = 123,058,574,351.23/402,708.42
  6. Step 6: Final answer
    x = 305,577.36

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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.