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Finding the Fourth Proportional to 988,320, 1,364,028 and 625,777.56

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Solution

The fourth proportional to 988,320, 1,364,028 and 625,777.56 is: 863,665.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    988,320 : 1,364,028 = 625,777.56 : x
  2. Step 2: Convert to fraction form
    988,320/1,364,028 = 625,777.56/x
  3. Step 3: Cross multiply
    988,320x = 1,364,028 × 625,777.56
  4. Step 4: Simplify right side
    988,320x = 853,578,113,611.68
  5. Step 5: Solve for x
    x = 853,578,113,611.68/988,320
  6. Step 6: Final answer
    x = 863,665.73

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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.