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Finding the Fourth Proportional to 317,902.32, 476,748.18 and 128,313.72

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Solution

The fourth proportional to 317,902.32, 476,748.18 and 128,313.72 is: 192,428.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,902.32 : 476,748.18 = 128,313.72 : x
  2. Step 2: Convert to fraction form
    317,902.32/476,748.18 = 128,313.72/x
  3. Step 3: Cross multiply
    317,902.32x = 476,748.18 × 128,313.72
  4. Step 4: Simplify right side
    317,902.32x = 61,173,332,479.03
  5. Step 5: Solve for x
    x = 61,173,332,479.03/317,902.32
  6. Step 6: Final answer
    x = 192,428.08

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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.