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Finding the Fourth Proportional to 485,718.10, 670,293.90 and 270,871.74

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Solution

The fourth proportional to 485,718.10, 670,293.90 and 270,871.74 is: 373,804.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,718.10 : 670,293.90 = 270,871.74 : x
  2. Step 2: Convert to fraction form
    485,718.10/670,293.90 = 270,871.74/x
  3. Step 3: Cross multiply
    485,718.10x = 670,293.90 × 270,871.74
  4. Step 4: Simplify right side
    485,718.10x = 181,563,675,004.39
  5. Step 5: Solve for x
    x = 181,563,675,004.39/485,718.10
  6. Step 6: Final answer
    x = 373,804.63

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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.