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Finding the Fourth Proportional to 819,797,079.20, 1,229,695,618.80 and 740,718,658.40

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Solution

The fourth proportional to 819,797,079.20, 1,229,695,618.80 and 740,718,658.40 is: 1,111,077,987.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,797,079.20 : 1,229,695,618.80 = 740,718,658.40 : x
  2. Step 2: Convert to fraction form
    819,797,079.20/1,229,695,618.80 = 740,718,658.40/x
  3. Step 3: Cross multiply
    819,797,079.20x = 1,229,695,618.80 × 740,718,658.40
  4. Step 4: Simplify right side
    819,797,079.20x = 910,858,488,997,893,760
  5. Step 5: Solve for x
    x = 910,858,488,997,893,760/819,797,079.20
  6. Step 6: Final answer
    x = 1,111,077,987.60

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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.