Home / 402,131,825-554,986,959.78-243,449,412.20

Finding the Fourth Proportional to 402,131,825, 554,986,959.78 and 243,449,412.20

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Solution

The fourth proportional to 402,131,825, 554,986,959.78 and 243,449,412.20 is: 335,987,456.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,131,825 : 554,986,959.78 = 243,449,412.20 : x
  2. Step 2: Convert to fraction form
    402,131,825/554,986,959.78 = 243,449,412.20/x
  3. Step 3: Cross multiply
    402,131,825x = 554,986,959.78 × 243,449,412.20
  4. Step 4: Simplify right side
    402,131,825x = 135,111,249,137,106,032
  5. Step 5: Solve for x
    x = 135,111,249,137,106,032/402,131,825
  6. Step 6: Final answer
    x = 335,987,456.69

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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.