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Finding the Fourth Proportional to 326,612.64, 489,728.27 and 126,699.42

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Solution

The fourth proportional to 326,612.64, 489,728.27 and 126,699.42 is: 189,975.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,612.64 : 489,728.27 = 126,699.42 : x
  2. Step 2: Convert to fraction form
    326,612.64/489,728.27 = 126,699.42/x
  3. Step 3: Cross multiply
    326,612.64x = 489,728.27 × 126,699.42
  4. Step 4: Simplify right side
    326,612.64x = 62,048,287,133.11
  5. Step 5: Solve for x
    x = 62,048,287,133.11/326,612.64
  6. Step 6: Final answer
    x = 189,975.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.