Home / 499,009,553.76-688,659,012.24-287,347,822.80

Finding the Fourth Proportional to 499,009,553.76, 688,659,012.24 and 287,347,822.80

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Solution

The fourth proportional to 499,009,553.76, 688,659,012.24 and 287,347,822.80 is: 396,554,868.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,009,553.76 : 688,659,012.24 = 287,347,822.80 : x
  2. Step 2: Convert to fraction form
    499,009,553.76/688,659,012.24 = 287,347,822.80/x
  3. Step 3: Cross multiply
    499,009,553.76x = 688,659,012.24 × 287,347,822.80
  4. Step 4: Simplify right side
    499,009,553.76x = 197,884,667,818,762,560
  5. Step 5: Solve for x
    x = 197,884,667,818,762,560/499,009,553.76
  6. Step 6: Final answer
    x = 396,554,868.19

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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.