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Finding the Fourth Proportional to 386,467.20, 579,700.80 and 137,090.88

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Solution

The fourth proportional to 386,467.20, 579,700.80 and 137,090.88 is: 205,636.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,467.20 : 579,700.80 = 137,090.88 : x
  2. Step 2: Convert to fraction form
    386,467.20/579,700.80 = 137,090.88/x
  3. Step 3: Cross multiply
    386,467.20x = 579,700.80 × 137,090.88
  4. Step 4: Simplify right side
    386,467.20x = 79,471,692,808.70
  5. Step 5: Solve for x
    x = 79,471,692,808.70/386,467.20
  6. Step 6: Final answer
    x = 205,636.32

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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.