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Finding the Fourth Proportional to 305,443.47, 421,535.16 and 169,503.21

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Solution

The fourth proportional to 305,443.47, 421,535.16 and 169,503.21 is: 233,927.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,443.47 : 421,535.16 = 169,503.21 : x
  2. Step 2: Convert to fraction form
    305,443.47/421,535.16 = 169,503.21/x
  3. Step 3: Cross multiply
    305,443.47x = 421,535.16 × 169,503.21
  4. Step 4: Simplify right side
    305,443.47x = 71,451,562,747.86
  5. Step 5: Solve for x
    x = 71,451,562,747.86/305,443.47
  6. Step 6: Final answer
    x = 233,927.29

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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.