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Finding the Fourth Proportional to 326,592.50, 489,919.71 and 126,928.28

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Solution

The fourth proportional to 326,592.50, 489,919.71 and 126,928.28 is: 190,404.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,592.50 : 489,919.71 = 126,928.28 : x
  2. Step 2: Convert to fraction form
    326,592.50/489,919.71 = 126,928.28/x
  3. Step 3: Cross multiply
    326,592.50x = 489,919.71 × 126,928.28
  4. Step 4: Simplify right side
    326,592.50x = 62,184,666,128.40
  5. Step 5: Solve for x
    x = 62,184,666,128.40/326,592.50
  6. Step 6: Final answer
    x = 190,404.45

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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.