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Finding the Fourth Proportional to 317,838.40, 476,320.20 and 210,918.40

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Solution

The fourth proportional to 317,838.40, 476,320.20 and 210,918.40 is: 316,087.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,838.40 : 476,320.20 = 210,918.40 : x
  2. Step 2: Convert to fraction form
    317,838.40/476,320.20 = 210,918.40/x
  3. Step 3: Cross multiply
    317,838.40x = 476,320.20 × 210,918.40
  4. Step 4: Simplify right side
    317,838.40x = 100,464,694,471.68
  5. Step 5: Solve for x
    x = 100,464,694,471.68/317,838.40
  6. Step 6: Final answer
    x = 316,087.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.