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Finding the Fourth Proportional to 317,889.32, 476,728.68 and 128,300.72

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Solution

The fourth proportional to 317,889.32, 476,728.68 and 128,300.72 is: 192,408.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,889.32 : 476,728.68 = 128,300.72 : x
  2. Step 2: Convert to fraction form
    317,889.32/476,728.68 = 128,300.72/x
  3. Step 3: Cross multiply
    317,889.32x = 476,728.68 × 128,300.72
  4. Step 4: Simplify right side
    317,889.32x = 61,164,632,888.65
  5. Step 5: Solve for x
    x = 61,164,632,888.65/317,889.32
  6. Step 6: Final answer
    x = 192,408.58

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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.