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Finding the Fourth Proportional to 326,088.60, 489,132.90 and 215,280.60

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Solution

The fourth proportional to 326,088.60, 489,132.90 and 215,280.60 is: 322,920.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,088.60 : 489,132.90 = 215,280.60 : x
  2. Step 2: Convert to fraction form
    326,088.60/489,132.90 = 215,280.60/x
  3. Step 3: Cross multiply
    326,088.60x = 489,132.90 × 215,280.60
  4. Step 4: Simplify right side
    326,088.60x = 105,300,824,191.74
  5. Step 5: Solve for x
    x = 105,300,824,191.74/326,088.60
  6. Step 6: Final answer
    x = 322,920.90

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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.