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Finding the Fourth Proportional to 644,234.71, 888,900.73 and 389,580.43

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Solution

The fourth proportional to 644,234.71, 888,900.73 and 389,580.43 is: 537,534.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,234.71 : 888,900.73 = 389,580.43 : x
  2. Step 2: Convert to fraction form
    644,234.71/888,900.73 = 389,580.43/x
  3. Step 3: Cross multiply
    644,234.71x = 888,900.73 × 389,580.43
  4. Step 4: Simplify right side
    644,234.71x = 346,298,328,620.71
  5. Step 5: Solve for x
    x = 346,298,328,620.71/644,234.71
  6. Step 6: Final answer
    x = 537,534.42

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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.