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Finding the Fourth Proportional to 402,605.25, 555,602.27 and 221,324.82

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Solution

The fourth proportional to 402,605.25, 555,602.27 and 221,324.82 is: 305,432.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,605.25 : 555,602.27 = 221,324.82 : x
  2. Step 2: Convert to fraction form
    402,605.25/555,602.27 = 221,324.82/x
  3. Step 3: Cross multiply
    402,605.25x = 555,602.27 × 221,324.82
  4. Step 4: Simplify right side
    402,605.25x = 122,968,571,292.72
  5. Step 5: Solve for x
    x = 122,968,571,292.72/402,605.25
  6. Step 6: Final answer
    x = 305,432.11

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1.5x scale

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.