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Finding the Fourth Proportional to 644,459.96, 889,211.58 and 389,805.68

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Solution

The fourth proportional to 644,459.96, 889,211.58 and 389,805.68 is: 537,845.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,459.96 : 889,211.58 = 389,805.68 : x
  2. Step 2: Convert to fraction form
    644,459.96/889,211.58 = 389,805.68/x
  3. Step 3: Cross multiply
    644,459.96x = 889,211.58 × 389,805.68
  4. Step 4: Simplify right side
    644,459.96x = 346,619,724,605.77
  5. Step 5: Solve for x
    x = 346,619,724,605.77/644,459.96
  6. Step 6: Final answer
    x = 537,845.24

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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.