Home / 687,705,147.20-1,031,557,720.80-343,331,379.20

Finding the Fourth Proportional to 687,705,147.20, 1,031,557,720.80 and 343,331,379.20

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Solution

The fourth proportional to 687,705,147.20, 1,031,557,720.80 and 343,331,379.20 is: 514,997,068.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,705,147.20 : 1,031,557,720.80 = 343,331,379.20 : x
  2. Step 2: Convert to fraction form
    687,705,147.20/1,031,557,720.80 = 343,331,379.20/x
  3. Step 3: Cross multiply
    687,705,147.20x = 1,031,557,720.80 × 343,331,379.20
  4. Step 4: Simplify right side
    687,705,147.20x = 354,166,135,006,672,512
  5. Step 5: Solve for x
    x = 354,166,135,006,672,512/687,705,147.20
  6. Step 6: Final answer
    x = 514,997,068.80

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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.