Home / 721,797,089.76-996,053,311.80-391,765,142.88

Finding the Fourth Proportional to 721,797,089.76, 996,053,311.80 and 391,765,142.88

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Solution

The fourth proportional to 721,797,089.76, 996,053,311.80 and 391,765,142.88 is: 540,621,420.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,797,089.76 : 996,053,311.80 = 391,765,142.88 : x
  2. Step 2: Convert to fraction form
    721,797,089.76/996,053,311.80 = 391,765,142.88/x
  3. Step 3: Cross multiply
    721,797,089.76x = 996,053,311.80 × 391,765,142.88
  4. Step 4: Simplify right side
    721,797,089.76x = 390,218,968,013,424,192
  5. Step 5: Solve for x
    x = 390,218,968,013,424,192/721,797,089.76
  6. Step 6: Final answer
    x = 540,621,420.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.