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Finding the Fourth Proportional to 645,158.41, 889,005.64 and 499,076.83

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Solution

The fourth proportional to 645,158.41, 889,005.64 and 499,076.83 is: 687,710.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,158.41 : 889,005.64 = 499,076.83 : x
  2. Step 2: Convert to fraction form
    645,158.41/889,005.64 = 499,076.83/x
  3. Step 3: Cross multiply
    645,158.41x = 889,005.64 × 499,076.83
  4. Step 4: Simplify right side
    645,158.41x = 443,682,116,663.32
  5. Step 5: Solve for x
    x = 443,682,116,663.32/645,158.41
  6. Step 6: Final answer
    x = 687,710.36

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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.