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Finding the Fourth Proportional to 663,289.30, 915,371.67 and 372,992.20

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Solution

The fourth proportional to 663,289.30, 915,371.67 and 372,992.20 is: 514,747.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,289.30 : 915,371.67 = 372,992.20 : x
  2. Step 2: Convert to fraction form
    663,289.30/915,371.67 = 372,992.20/x
  3. Step 3: Cross multiply
    663,289.30x = 915,371.67 × 372,992.20
  4. Step 4: Simplify right side
    663,289.30x = 341,426,493,010.97
  5. Step 5: Solve for x
    x = 341,426,493,010.97/663,289.30
  6. Step 6: Final answer
    x = 514,747.48

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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.