Home / 638,396,777.40-880,987,154.89-345,041,345.40

Finding the Fourth Proportional to 638,396,777.40, 880,987,154.89 and 345,041,345.40

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Solution

The fourth proportional to 638,396,777.40, 880,987,154.89 and 345,041,345.40 is: 476,156,841.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,396,777.40 : 880,987,154.89 = 345,041,345.40 : x
  2. Step 2: Convert to fraction form
    638,396,777.40/880,987,154.89 = 345,041,345.40/x
  3. Step 3: Cross multiply
    638,396,777.40x = 880,987,154.89 × 345,041,345.40
  4. Step 4: Simplify right side
    638,396,777.40x = 303,976,993,202,501,184
  5. Step 5: Solve for x
    x = 303,976,993,202,501,184/638,396,777.40
  6. Step 6: Final answer
    x = 476,156,841.58

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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.