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Finding the Fourth Proportional to 402,521.66, 555,481.05 and 221,252.16

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Solution

The fourth proportional to 402,521.66, 555,481.05 and 221,252.16 is: 305,328.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,521.66 : 555,481.05 = 221,252.16 : x
  2. Step 2: Convert to fraction form
    402,521.66/555,481.05 = 221,252.16/x
  3. Step 3: Cross multiply
    402,521.66x = 555,481.05 × 221,252.16
  4. Step 4: Simplify right side
    402,521.66x = 122,901,382,151.57
  5. Step 5: Solve for x
    x = 122,901,382,151.57/402,521.66
  6. Step 6: Final answer
    x = 305,328.62

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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.