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Finding the Fourth Proportional to 317,919.78, 438,728.94 and 174,679.47

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Solution

The fourth proportional to 317,919.78, 438,728.94 and 174,679.47 is: 241,057.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,919.78 : 438,728.94 = 174,679.47 : x
  2. Step 2: Convert to fraction form
    317,919.78/438,728.94 = 174,679.47/x
  3. Step 3: Cross multiply
    317,919.78x = 438,728.94 × 174,679.47
  4. Step 4: Simplify right side
    317,919.78x = 76,636,938,712.86
  5. Step 5: Solve for x
    x = 76,636,938,712.86/317,919.78
  6. Step 6: Final answer
    x = 241,057.47

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1.5x scale

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.