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Finding the Fourth Proportional to 326,420.40, 489,591.72 and 89,787.12

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Solution

The fourth proportional to 326,420.40, 489,591.72 and 89,787.12 is: 134,669.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,420.40 : 489,591.72 = 89,787.12 : x
  2. Step 2: Convert to fraction form
    326,420.40/489,591.72 = 89,787.12/x
  3. Step 3: Cross multiply
    326,420.40x = 489,591.72 × 89,787.12
  4. Step 4: Simplify right side
    326,420.40x = 43,959,030,514.65
  5. Step 5: Solve for x
    x = 43,959,030,514.65/326,420.40
  6. Step 6: Final answer
    x = 134,669.99

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1.5x scale

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.