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Finding the Fourth Proportional to 876,708,751.96, 1,209,843,249.66 and 485,559,777.88

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Solution

The fourth proportional to 876,708,751.96, 1,209,843,249.66 and 485,559,777.88 is: 670,064,281.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,708,751.96 : 1,209,843,249.66 = 485,559,777.88 : x
  2. Step 2: Convert to fraction form
    876,708,751.96/1,209,843,249.66 = 485,559,777.88/x
  3. Step 3: Cross multiply
    876,708,751.96x = 1,209,843,249.66 × 485,559,777.88
  4. Step 4: Simplify right side
    876,708,751.96x = 587,451,219,574,526,976
  5. Step 5: Solve for x
    x = 587,451,219,574,526,976/876,708,751.96
  6. Step 6: Final answer
    x = 670,064,281.05

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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.