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Finding the Fourth Proportional to 317,793.45, 438,558.12 and 172,602.07

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Solution

The fourth proportional to 317,793.45, 438,558.12 and 172,602.07 is: 238,192.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,793.45 : 438,558.12 = 172,602.07 : x
  2. Step 2: Convert to fraction form
    317,793.45/438,558.12 = 172,602.07/x
  3. Step 3: Cross multiply
    317,793.45x = 438,558.12 × 172,602.07
  4. Step 4: Simplify right side
    317,793.45x = 75,696,038,230.91
  5. Step 5: Solve for x
    x = 75,696,038,230.91/317,793.45
  6. Step 6: Final answer
    x = 238,192.57

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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.