Home / 317,835.48-438,610.95-172,639.78

Finding the Fourth Proportional to 317,835.48, 438,610.95 and 172,639.78

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Solution

The fourth proportional to 317,835.48, 438,610.95 and 172,639.78 is: 238,241.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,835.48 : 438,610.95 = 172,639.78 : x
  2. Step 2: Convert to fraction form
    317,835.48/438,610.95 = 172,639.78/x
  3. Step 3: Cross multiply
    317,835.48x = 438,610.95 × 172,639.78
  4. Step 4: Simplify right side
    317,835.48x = 75,721,697,913.59
  5. Step 5: Solve for x
    x = 75,721,697,913.59/317,835.48
  6. Step 6: Final answer
    x = 238,241.80

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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.