Home / 644,436.12-889,121.61-372,404.91

Finding the Fourth Proportional to 644,436.12, 889,121.61 and 372,404.91

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Solution

The fourth proportional to 644,436.12, 889,121.61 and 372,404.91 is: 513,803.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,436.12 : 889,121.61 = 372,404.91 : x
  2. Step 2: Convert to fraction form
    644,436.12/889,121.61 = 372,404.91/x
  3. Step 3: Cross multiply
    644,436.12x = 889,121.61 × 372,404.91
  4. Step 4: Simplify right side
    644,436.12x = 331,113,253,151.11
  5. Step 5: Solve for x
    x = 331,113,253,151.11/644,436.12
  6. Step 6: Final answer
    x = 513,803.06

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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.