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Finding the Fourth Proportional to 643,163.37, 887,543.10 and 356,710.11

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Solution

The fourth proportional to 643,163.37, 887,543.10 and 356,710.11 is: 492,247.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,163.37 : 887,543.10 = 356,710.11 : x
  2. Step 2: Convert to fraction form
    643,163.37/887,543.10 = 356,710.11/x
  3. Step 3: Cross multiply
    643,163.37x = 887,543.10 × 356,710.11
  4. Step 4: Simplify right side
    643,163.37x = 316,595,596,830.74
  5. Step 5: Solve for x
    x = 316,595,596,830.74/643,163.37
  6. Step 6: Final answer
    x = 492,247.56

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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.