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Finding the Fourth Proportional to 807,777.92, 1,114,580 and 485,370.38

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Solution

The fourth proportional to 807,777.92, 1,114,580 and 485,370.38 is: 669,718.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,777.92 : 1,114,580 = 485,370.38 : x
  2. Step 2: Convert to fraction form
    807,777.92/1,114,580 = 485,370.38/x
  3. Step 3: Cross multiply
    807,777.92x = 1,114,580 × 485,370.38
  4. Step 4: Simplify right side
    807,777.92x = 540,984,118,140.40
  5. Step 5: Solve for x
    x = 540,984,118,140.40/807,777.92
  6. Step 6: Final answer
    x = 669,718.87

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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.