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Finding the Fourth Proportional to 644,429.62, 889,560.88 and 429,491.26

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Solution

The fourth proportional to 644,429.62, 889,560.88 and 429,491.26 is: 592,863.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,429.62 : 889,560.88 = 429,491.26 : x
  2. Step 2: Convert to fraction form
    644,429.62/889,560.88 = 429,491.26/x
  3. Step 3: Cross multiply
    644,429.62x = 889,560.88 × 429,491.26
  4. Step 4: Simplify right side
    644,429.62x = 382,058,625,652.02
  5. Step 5: Solve for x
    x = 382,058,625,652.02/644,429.62
  6. Step 6: Final answer
    x = 592,863.23

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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.