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Finding the Fourth Proportional to 317,528.92, 438,553.59 and 209,117.88

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Solution

The fourth proportional to 317,528.92, 438,553.59 and 209,117.88 is: 288,822.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,528.92 : 438,553.59 = 209,117.88 : x
  2. Step 2: Convert to fraction form
    317,528.92/438,553.59 = 209,117.88/x
  3. Step 3: Cross multiply
    317,528.92x = 438,553.59 × 209,117.88
  4. Step 4: Simplify right side
    317,528.92x = 91,709,397,007.19
  5. Step 5: Solve for x
    x = 91,709,397,007.19/317,528.92
  6. Step 6: Final answer
    x = 288,822.19

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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.