Home / 644,369.32-889,205.07-357,907.78

Finding the Fourth Proportional to 644,369.32, 889,205.07 and 357,907.78

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Solution

The fourth proportional to 644,369.32, 889,205.07 and 357,907.78 is: 493,899.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,369.32 : 889,205.07 = 357,907.78 : x
  2. Step 2: Convert to fraction form
    644,369.32/889,205.07 = 357,907.78/x
  3. Step 3: Cross multiply
    644,369.32x = 889,205.07 × 357,907.78
  4. Step 4: Simplify right side
    644,369.32x = 318,253,412,568.45
  5. Step 5: Solve for x
    x = 318,253,412,568.45/644,369.32
  6. Step 6: Final answer
    x = 493,899.08

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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.