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Finding the Fourth Proportional to 326,646.40, 489,969.60 and 105,052.80

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Solution

The fourth proportional to 326,646.40, 489,969.60 and 105,052.80 is: 157,579.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,646.40 : 489,969.60 = 105,052.80 : x
  2. Step 2: Convert to fraction form
    326,646.40/489,969.60 = 105,052.80/x
  3. Step 3: Cross multiply
    326,646.40x = 489,969.60 × 105,052.80
  4. Step 4: Simplify right side
    326,646.40x = 51,472,678,394.88
  5. Step 5: Solve for x
    x = 51,472,678,394.88/326,646.40
  6. Step 6: Final answer
    x = 157,579.20

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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.