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Finding the Fourth Proportional to 644,428.98, 889,428.42 and 372,459.24

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Solution

The fourth proportional to 644,428.98, 889,428.42 and 372,459.24 is: 514,061.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,428.98 : 889,428.42 = 372,459.24 : x
  2. Step 2: Convert to fraction form
    644,428.98/889,428.42 = 372,459.24/x
  3. Step 3: Cross multiply
    644,428.98x = 889,428.42 × 372,459.24
  4. Step 4: Simplify right side
    644,428.98x = 331,275,833,347.60
  5. Step 5: Solve for x
    x = 331,275,833,347.60/644,428.98
  6. Step 6: Final answer
    x = 514,061.04

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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.