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Finding the Fourth Proportional to 644,238.88, 889,061.60 and 357,785.64

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Solution

The fourth proportional to 644,238.88, 889,061.60 and 357,785.64 is: 493,750.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,238.88 : 889,061.60 = 357,785.64 : x
  2. Step 2: Convert to fraction form
    644,238.88/889,061.60 = 357,785.64/x
  3. Step 3: Cross multiply
    644,238.88x = 889,061.60 × 357,785.64
  4. Step 4: Simplify right side
    644,238.88x = 318,093,473,555.42
  5. Step 5: Solve for x
    x = 318,093,473,555.42/644,238.88
  6. Step 6: Final answer
    x = 493,750.82

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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.