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Finding the Fourth Proportional to 644,237.76, 889,884.72 and 490,341

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Solution

The fourth proportional to 644,237.76, 889,884.72 and 490,341 is: 677,307.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,237.76 : 889,884.72 = 490,341 : x
  2. Step 2: Convert to fraction form
    644,237.76/889,884.72 = 490,341/x
  3. Step 3: Cross multiply
    644,237.76x = 889,884.72 × 490,341
  4. Step 4: Simplify right side
    644,237.76x = 436,346,963,489.52
  5. Step 5: Solve for x
    x = 436,346,963,489.52/644,237.76
  6. Step 6: Final answer
    x = 677,307.34

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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.