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Finding the Fourth Proportional to 644,261.16, 889,109.92 and 357,782.52

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Solution

The fourth proportional to 644,261.16, 889,109.92 and 357,782.52 is: 493,756.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,261.16 : 889,109.92 = 357,782.52 : x
  2. Step 2: Convert to fraction form
    644,261.16/889,109.92 = 357,782.52/x
  3. Step 3: Cross multiply
    644,261.16x = 889,109.92 × 357,782.52
  4. Step 4: Simplify right side
    644,261.16x = 318,107,987,734.60
  5. Step 5: Solve for x
    x = 318,107,987,734.60/644,261.16
  6. Step 6: Final answer
    x = 493,756.27

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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.