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Finding the Fourth Proportional to 721,797,157.44, 996,053,404.86 and 391,765,210.56

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Solution

The fourth proportional to 721,797,157.44, 996,053,404.86 and 391,765,210.56 is: 540,621,513.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,797,157.44 : 996,053,404.86 = 391,765,210.56 : x
  2. Step 2: Convert to fraction form
    721,797,157.44/996,053,404.86 = 391,765,210.56/x
  3. Step 3: Cross multiply
    721,797,157.44x = 996,053,404.86 × 391,765,210.56
  4. Step 4: Simplify right side
    721,797,157.44x = 390,219,071,883,982,848
  5. Step 5: Solve for x
    x = 390,219,071,883,982,848/721,797,157.44
  6. Step 6: Final answer
    x = 540,621,513.76

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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.