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Finding the Fourth Proportional to 644,503.19, 889,315.67 and 372,518.69

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Solution

The fourth proportional to 644,503.19, 889,315.67 and 372,518.69 is: 514,018.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,503.19 : 889,315.67 = 372,518.69 : x
  2. Step 2: Convert to fraction form
    644,503.19/889,315.67 = 372,518.69/x
  3. Step 3: Cross multiply
    644,503.19x = 889,315.67 × 372,518.69
  4. Step 4: Simplify right side
    644,503.19x = 331,286,704,869.59
  5. Step 5: Solve for x
    x = 331,286,704,869.59/644,503.19
  6. Step 6: Final answer
    x = 514,018.72

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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.