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Finding the Fourth Proportional to 326,316.89, 489,416.95 and 207,635.69

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Solution

The fourth proportional to 326,316.89, 489,416.95 and 207,635.69 is: 311,416.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,316.89 : 489,416.95 = 207,635.69 : x
  2. Step 2: Convert to fraction form
    326,316.89/489,416.95 = 207,635.69/x
  3. Step 3: Cross multiply
    326,316.89x = 489,416.95 × 207,635.69
  4. Step 4: Simplify right side
    326,316.89x = 101,620,427,594.03
  5. Step 5: Solve for x
    x = 101,620,427,594.03/326,316.89
  6. Step 6: Final answer
    x = 311,416.39

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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.