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Finding the Fourth Proportional to 402,267.78, 555,133.06 and 220,983.40

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Solution

The fourth proportional to 402,267.78, 555,133.06 and 220,983.40 is: 304,959.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,267.78 : 555,133.06 = 220,983.40 : x
  2. Step 2: Convert to fraction form
    402,267.78/555,133.06 = 220,983.40/x
  3. Step 3: Cross multiply
    402,267.78x = 555,133.06 × 220,983.40
  4. Step 4: Simplify right side
    402,267.78x = 122,675,191,051.20
  5. Step 5: Solve for x
    x = 122,675,191,051.20/402,267.78
  6. Step 6: Final answer
    x = 304,959.03

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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.