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Finding the Fourth Proportional to 317,795.70, 438,561.23 and 172,604.32

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Solution

The fourth proportional to 317,795.70, 438,561.23 and 172,604.32 is: 238,195.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,795.70 : 438,561.23 = 172,604.32 : x
  2. Step 2: Convert to fraction form
    317,795.70/438,561.23 = 172,604.32/x
  3. Step 3: Cross multiply
    317,795.70x = 438,561.23 × 172,604.32
  4. Step 4: Simplify right side
    317,795.70x = 75,697,562,882.51
  5. Step 5: Solve for x
    x = 75,697,562,882.51/317,795.70
  6. Step 6: Final answer
    x = 238,195.68

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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.