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Finding the Fourth Proportional to 326,666.40, 489,767.94 and 126,818.34

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Solution

The fourth proportional to 326,666.40, 489,767.94 and 126,818.34 is: 190,137.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,666.40 : 489,767.94 = 126,818.34 : x
  2. Step 2: Convert to fraction form
    326,666.40/489,767.94 = 126,818.34/x
  3. Step 3: Cross multiply
    326,666.40x = 489,767.94 × 126,818.34
  4. Step 4: Simplify right side
    326,666.40x = 62,111,557,136.02
  5. Step 5: Solve for x
    x = 62,111,557,136.02/326,666.40
  6. Step 6: Final answer
    x = 190,137.58

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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.