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Finding the Fourth Proportional to 402,477.19, 555,428.73 and 221,193.73

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Solution

The fourth proportional to 402,477.19, 555,428.73 and 221,193.73 is: 305,252.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,477.19 : 555,428.73 = 221,193.73 : x
  2. Step 2: Convert to fraction form
    402,477.19/555,428.73 = 221,193.73/x
  3. Step 3: Cross multiply
    402,477.19x = 555,428.73 × 221,193.73
  4. Step 4: Simplify right side
    402,477.19x = 122,857,352,537.86
  5. Step 5: Solve for x
    x = 122,857,352,537.86/402,477.19
  6. Step 6: Final answer
    x = 305,252.96

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Double scale
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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.