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Finding the Fourth Proportional to 305,315.28, 421,329.96 and 169,349.40

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Solution

The fourth proportional to 305,315.28, 421,329.96 and 169,349.40 is: 233,699.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,315.28 : 421,329.96 = 169,349.40 : x
  2. Step 2: Convert to fraction form
    305,315.28/421,329.96 = 169,349.40/x
  3. Step 3: Cross multiply
    305,315.28x = 421,329.96 × 169,349.40
  4. Step 4: Simplify right side
    305,315.28x = 71,351,975,928.02
  5. Step 5: Solve for x
    x = 71,351,975,928.02/305,315.28
  6. Step 6: Final answer
    x = 233,699.33

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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.