Home / 644,934.78-889,968.87-358,437.42

Finding the Fourth Proportional to 644,934.78, 889,968.87 and 358,437.42

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Solution

The fourth proportional to 644,934.78, 889,968.87 and 358,437.42 is: 494,620.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,934.78 : 889,968.87 = 358,437.42 : x
  2. Step 2: Convert to fraction form
    644,934.78/889,968.87 = 358,437.42/x
  3. Step 3: Cross multiply
    644,934.78x = 889,968.87 × 358,437.42
  4. Step 4: Simplify right side
    644,934.78x = 318,998,145,643.12
  5. Step 5: Solve for x
    x = 318,998,145,643.12/644,934.78
  6. Step 6: Final answer
    x = 494,620.78

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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.