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Finding the Fourth Proportional to 644,758.71, 889,726.32 and 358,261.71

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Solution

The fourth proportional to 644,758.71, 889,726.32 and 358,261.71 is: 494,378.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,758.71 : 889,726.32 = 358,261.71 : x
  2. Step 2: Convert to fraction form
    644,758.71/889,726.32 = 358,261.71/x
  3. Step 3: Cross multiply
    644,758.71x = 889,726.32 × 358,261.71
  4. Step 4: Simplify right side
    644,758.71x = 318,754,872,835.21
  5. Step 5: Solve for x
    x = 318,754,872,835.21/644,758.71
  6. Step 6: Final answer
    x = 494,378.54

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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.