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Finding the Fourth Proportional to 317,794.70, 438,559.85 and 172,603.32

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Solution

The fourth proportional to 317,794.70, 438,559.85 and 172,603.32 is: 238,194.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,794.70 : 438,559.85 = 172,603.32 : x
  2. Step 2: Convert to fraction form
    317,794.70/438,559.85 = 172,603.32/x
  3. Step 3: Cross multiply
    317,794.70x = 438,559.85 × 172,603.32
  4. Step 4: Simplify right side
    317,794.70x = 75,696,886,128.70
  5. Step 5: Solve for x
    x = 75,696,886,128.70/317,794.70
  6. Step 6: Final answer
    x = 238,194.30

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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.