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Finding the Fourth Proportional to 402,637.50, 555,650.34 and 221,354.00

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Solution

The fourth proportional to 402,637.50, 555,650.34 and 221,354.00 is: 305,474.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,637.50 : 555,650.34 = 221,354.00 : x
  2. Step 2: Convert to fraction form
    402,637.50/555,650.34 = 221,354.00/x
  3. Step 3: Cross multiply
    402,637.50x = 555,650.34 × 221,354.00
  4. Step 4: Simplify right side
    402,637.50x = 122,995,422,582.11
  5. Step 5: Solve for x
    x = 122,995,422,582.11/402,637.50
  6. Step 6: Final answer
    x = 305,474.34

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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.