Home / 386,621.60-579,932.40-274,647.20

Finding the Fourth Proportional to 386,621.60, 579,932.40 and 274,647.20

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Solution

The fourth proportional to 386,621.60, 579,932.40 and 274,647.20 is: 411,970.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,621.60 : 579,932.40 = 274,647.20 : x
  2. Step 2: Convert to fraction form
    386,621.60/579,932.40 = 274,647.20/x
  3. Step 3: Cross multiply
    386,621.60x = 579,932.40 × 274,647.20
  4. Step 4: Simplify right side
    386,621.60x = 159,276,809,849.28
  5. Step 5: Solve for x
    x = 159,276,809,849.28/386,621.60
  6. Step 6: Final answer
    x = 411,970.80

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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.