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Finding the Fourth Proportional to 644,429.98, 889,429.80 and 372,460.24

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Solution

The fourth proportional to 644,429.98, 889,429.80 and 372,460.24 is: 514,062.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,429.98 : 889,429.80 = 372,460.24 : x
  2. Step 2: Convert to fraction form
    644,429.98/889,429.80 = 372,460.24/x
  3. Step 3: Cross multiply
    644,429.98x = 889,429.80 × 372,460.24
  4. Step 4: Simplify right side
    644,429.98x = 331,277,236,771.15
  5. Step 5: Solve for x
    x = 331,277,236,771.15/644,429.98
  6. Step 6: Final answer
    x = 514,062.42

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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.