Home / 386,837.20-580,255.80-380,932.30

Finding the Fourth Proportional to 386,837.20, 580,255.80 and 380,932.30

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Solution

The fourth proportional to 386,837.20, 580,255.80 and 380,932.30 is: 571,398.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,837.20 : 580,255.80 = 380,932.30 : x
  2. Step 2: Convert to fraction form
    386,837.20/580,255.80 = 380,932.30/x
  3. Step 3: Cross multiply
    386,837.20x = 580,255.80 × 380,932.30
  4. Step 4: Simplify right side
    386,837.20x = 221,038,176,482.34
  5. Step 5: Solve for x
    x = 221,038,176,482.34/386,837.20
  6. Step 6: Final answer
    x = 571,398.45

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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.