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Finding the Fourth Proportional to 644,265.92, 889,098.84 and 357,812.72

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Solution

The fourth proportional to 644,265.92, 889,098.84 and 357,812.72 is: 493,788.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,265.92 : 889,098.84 = 357,812.72 : x
  2. Step 2: Convert to fraction form
    644,265.92/889,098.84 = 357,812.72/x
  3. Step 3: Cross multiply
    644,265.92x = 889,098.84 × 357,812.72
  4. Step 4: Simplify right side
    644,265.92x = 318,130,874,289.25
  5. Step 5: Solve for x
    x = 318,130,874,289.25/644,265.92
  6. Step 6: Final answer
    x = 493,788.15

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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.