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Finding the Fourth Proportional to 927,457.97, 1,391,319 and 287,816.94

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Solution

The fourth proportional to 927,457.97, 1,391,319 and 287,816.94 is: 431,766.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    927,457.97 : 1,391,319 = 287,816.94 : x
  2. Step 2: Convert to fraction form
    927,457.97/1,391,319 = 287,816.94/x
  3. Step 3: Cross multiply
    927,457.97x = 1,391,319 × 287,816.94
  4. Step 4: Simplify right side
    927,457.97x = 400,445,177,143.86
  5. Step 5: Solve for x
    x = 400,445,177,143.86/927,457.97
  6. Step 6: Final answer
    x = 431,766.39

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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.