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Finding the Fourth Proportional to 317,318.09, 472,679.10 and 300,128.94

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Solution

The fourth proportional to 317,318.09, 472,679.10 and 300,128.94 is: 447,074.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,318.09 : 472,679.10 = 300,128.94 : x
  2. Step 2: Convert to fraction form
    317,318.09/472,679.10 = 300,128.94/x
  3. Step 3: Cross multiply
    317,318.09x = 472,679.10 × 300,128.94
  4. Step 4: Simplify right side
    317,318.09x = 141,864,677,243.15
  5. Step 5: Solve for x
    x = 141,864,677,243.15/317,318.09
  6. Step 6: Final answer
    x = 447,074.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.