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Finding the Fourth Proportional to 402,610.40, 555,541.48 and 221,330

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Solution

The fourth proportional to 402,610.40, 555,541.48 and 221,330 is: 305,401.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,610.40 : 555,541.48 = 221,330 : x
  2. Step 2: Convert to fraction form
    402,610.40/555,541.48 = 221,330/x
  3. Step 3: Cross multiply
    402,610.40x = 555,541.48 × 221,330
  4. Step 4: Simplify right side
    402,610.40x = 122,957,995,768.40
  5. Step 5: Solve for x
    x = 122,957,995,768.40/402,610.40
  6. Step 6: Final answer
    x = 305,401.94

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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.