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Finding the Fourth Proportional to 828,400.80, 1,243,522.80 and 513,213.60

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Solution

The fourth proportional to 828,400.80, 1,243,522.80 and 513,213.60 is: 770,391.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,400.80 : 1,243,522.80 = 513,213.60 : x
  2. Step 2: Convert to fraction form
    828,400.80/1,243,522.80 = 513,213.60/x
  3. Step 3: Cross multiply
    828,400.80x = 1,243,522.80 × 513,213.60
  4. Step 4: Simplify right side
    828,400.80x = 638,192,812,870.08
  5. Step 5: Solve for x
    x = 638,192,812,870.08/828,400.80
  6. Step 6: Final answer
    x = 770,391.35

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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.