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Finding the Fourth Proportional to 644,277.65, 889,502.72 and 415,229.49

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Solution

The fourth proportional to 644,277.65, 889,502.72 and 415,229.49 is: 573,274.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,277.65 : 889,502.72 = 415,229.49 : x
  2. Step 2: Convert to fraction form
    644,277.65/889,502.72 = 415,229.49/x
  3. Step 3: Cross multiply
    644,277.65x = 889,502.72 × 415,229.49
  4. Step 4: Simplify right side
    644,277.65x = 369,347,758,703.07
  5. Step 5: Solve for x
    x = 369,347,758,703.07/644,277.65
  6. Step 6: Final answer
    x = 573,274.21

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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.