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Finding the Fourth Proportional to 991,874.80, 1,487,812.20 and 326,940.40

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Solution

The fourth proportional to 991,874.80, 1,487,812.20 and 326,940.40 is: 490,410.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,874.80 : 1,487,812.20 = 326,940.40 : x
  2. Step 2: Convert to fraction form
    991,874.80/1,487,812.20 = 326,940.40/x
  3. Step 3: Cross multiply
    991,874.80x = 1,487,812.20 × 326,940.40
  4. Step 4: Simplify right side
    991,874.80x = 486,425,915,792.88
  5. Step 5: Solve for x
    x = 486,425,915,792.88/991,874.80
  6. Step 6: Final answer
    x = 490,410.60

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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.