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Finding the Fourth Proportional to 402,730.44, 555,782.28 and 221,456.16

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Solution

The fourth proportional to 402,730.44, 555,782.28 and 221,456.16 is: 305,617.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,730.44 : 555,782.28 = 221,456.16 : x
  2. Step 2: Convert to fraction form
    402,730.44/555,782.28 = 221,456.16/x
  3. Step 3: Cross multiply
    402,730.44x = 555,782.28 × 221,456.16
  4. Step 4: Simplify right side
    402,730.44x = 123,081,409,524.85
  5. Step 5: Solve for x
    x = 123,081,409,524.85/402,730.44
  6. Step 6: Final answer
    x = 305,617.35

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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.