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Finding the Fourth Proportional to 326,411.60, 489,228.60 and 136,871.60

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Solution

The fourth proportional to 326,411.60, 489,228.60 and 136,871.60 is: 205,144.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,411.60 : 489,228.60 = 136,871.60 : x
  2. Step 2: Convert to fraction form
    326,411.60/489,228.60 = 136,871.60/x
  3. Step 3: Cross multiply
    326,411.60x = 489,228.60 × 136,871.60
  4. Step 4: Simplify right side
    326,411.60x = 66,961,501,247.76
  5. Step 5: Solve for x
    x = 66,961,501,247.76/326,411.60
  6. Step 6: Final answer
    x = 205,144.37

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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.