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Finding the Fourth Proportional to 644,697.64, 889,630.60 and 372,783.12

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Solution

The fourth proportional to 644,697.64, 889,630.60 and 372,783.12 is: 514,410.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,697.64 : 889,630.60 = 372,783.12 : x
  2. Step 2: Convert to fraction form
    644,697.64/889,630.60 = 372,783.12/x
  3. Step 3: Cross multiply
    644,697.64x = 889,630.60 × 372,783.12
  4. Step 4: Simplify right side
    644,697.64x = 331,639,270,715.47
  5. Step 5: Solve for x
    x = 331,639,270,715.47/644,697.64
  6. Step 6: Final answer
    x = 514,410.55

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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.