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Finding the Fourth Proportional to 257,498.13, 386,296.40 and 79,998.48

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Solution

The fourth proportional to 257,498.13, 386,296.40 and 79,998.48 is: 120,013.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,498.13 : 386,296.40 = 79,998.48 : x
  2. Step 2: Convert to fraction form
    257,498.13/386,296.40 = 79,998.48/x
  3. Step 3: Cross multiply
    257,498.13x = 386,296.40 × 79,998.48
  4. Step 4: Simplify right side
    257,498.13x = 30,903,125,029.47
  5. Step 5: Solve for x
    x = 30,903,125,029.47/257,498.13
  6. Step 6: Final answer
    x = 120,013.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.