Home / 425,656,278.68-638,177,989.23-261,554,990.66

Finding the Fourth Proportional to 425,656,278.68, 638,177,989.23 and 261,554,990.66

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Solution

The fourth proportional to 425,656,278.68, 638,177,989.23 and 261,554,990.66 is: 392,144,193.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,656,278.68 : 638,177,989.23 = 261,554,990.66 : x
  2. Step 2: Convert to fraction form
    425,656,278.68/638,177,989.23 = 261,554,990.66/x
  3. Step 3: Cross multiply
    425,656,278.68x = 638,177,989.23 × 261,554,990.66
  4. Step 4: Simplify right side
    425,656,278.68x = 166,918,638,009,279,360
  5. Step 5: Solve for x
    x = 166,918,638,009,279,360/425,656,278.68
  6. Step 6: Final answer
    x = 392,144,193.27

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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.