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Finding the Fourth Proportional to 663,380.76, 915,455.29 and 372,992.58

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Solution

The fourth proportional to 663,380.76, 915,455.29 and 372,992.58 is: 514,724.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,380.76 : 915,455.29 = 372,992.58 : x
  2. Step 2: Convert to fraction form
    663,380.76/915,455.29 = 372,992.58/x
  3. Step 3: Cross multiply
    663,380.76x = 915,455.29 × 372,992.58
  4. Step 4: Simplify right side
    663,380.76x = 341,458,030,491.75
  5. Step 5: Solve for x
    x = 341,458,030,491.75/663,380.76
  6. Step 6: Final answer
    x = 514,724.05

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1.5x scale

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.