Home / 644,904.48-889,961.77-358,418.42

Finding the Fourth Proportional to 644,904.48, 889,961.77 and 358,418.42

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Solution

The fourth proportional to 644,904.48, 889,961.77 and 358,418.42 is: 494,613.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,904.48 : 889,961.77 = 358,418.42 : x
  2. Step 2: Convert to fraction form
    644,904.48/889,961.77 = 358,418.42/x
  3. Step 3: Cross multiply
    644,904.48x = 889,961.77 × 358,418.42
  4. Step 4: Simplify right side
    644,904.48x = 318,978,685,221.90
  5. Step 5: Solve for x
    x = 318,978,685,221.90/644,904.48
  6. Step 6: Final answer
    x = 494,613.85

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1.5x scale

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.