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Finding the Fourth Proportional to 644,574.60, 889,655.22 and 358,193.16

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Solution

The fourth proportional to 644,574.60, 889,655.22 and 358,193.16 is: 494,385.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,574.60 : 889,655.22 = 358,193.16 : x
  2. Step 2: Convert to fraction form
    644,574.60/889,655.22 = 358,193.16/x
  3. Step 3: Cross multiply
    644,574.60x = 889,655.22 × 358,193.16
  4. Step 4: Simplify right side
    644,574.60x = 318,668,414,562.30
  5. Step 5: Solve for x
    x = 318,668,414,562.30/644,574.60
  6. Step 6: Final answer
    x = 494,385.62

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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.