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Finding the Fourth Proportional to 402,659.82, 555,656.37 and 221,370.44

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Solution

The fourth proportional to 402,659.82, 555,656.37 and 221,370.44 is: 305,483.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,659.82 : 555,656.37 = 221,370.44 : x
  2. Step 2: Convert to fraction form
    402,659.82/555,656.37 = 221,370.44/x
  3. Step 3: Cross multiply
    402,659.82x = 555,656.37 × 221,370.44
  4. Step 4: Simplify right side
    402,659.82x = 123,005,892,337.42
  5. Step 5: Solve for x
    x = 123,005,892,337.42/402,659.82
  6. Step 6: Final answer
    x = 305,483.40

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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.