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Finding the Fourth Proportional to 828,121.80, 1,240,651.80 and 472,078.20

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Solution

The fourth proportional to 828,121.80, 1,240,651.80 and 472,078.20 is: 707,244.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,121.80 : 1,240,651.80 = 472,078.20 : x
  2. Step 2: Convert to fraction form
    828,121.80/1,240,651.80 = 472,078.20/x
  3. Step 3: Cross multiply
    828,121.80x = 1,240,651.80 × 472,078.20
  4. Step 4: Simplify right side
    828,121.80x = 585,684,668,570.76
  5. Step 5: Solve for x
    x = 585,684,668,570.76/828,121.80
  6. Step 6: Final answer
    x = 707,244.60

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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.