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Finding the Fourth Proportional to 644,169.64, 889,036.10 and 389,522.64

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Solution

The fourth proportional to 644,169.64, 889,036.10 and 389,522.64 is: 537,590.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,169.64 : 889,036.10 = 389,522.64 : x
  2. Step 2: Convert to fraction form
    644,169.64/889,036.10 = 389,522.64/x
  3. Step 3: Cross multiply
    644,169.64x = 889,036.10 × 389,522.64
  4. Step 4: Simplify right side
    644,169.64x = 346,299,688,727.30
  5. Step 5: Solve for x
    x = 346,299,688,727.30/644,169.64
  6. Step 6: Final answer
    x = 537,590.83

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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.