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Finding the Fourth Proportional to 317,856.98, 438,640.52 and 172,661.45

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Solution

The fourth proportional to 317,856.98, 438,640.52 and 172,661.45 is: 238,271.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,856.98 : 438,640.52 = 172,661.45 : x
  2. Step 2: Convert to fraction form
    317,856.98/438,640.52 = 172,661.45/x
  3. Step 3: Cross multiply
    317,856.98x = 438,640.52 × 172,661.45
  4. Step 4: Simplify right side
    317,856.98x = 75,736,305,155.44
  5. Step 5: Solve for x
    x = 75,736,305,155.44/317,856.98
  6. Step 6: Final answer
    x = 238,271.65

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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.