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Finding the Fourth Proportional to 328,514.32, 492,771.48 and 128,928.70

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Solution

The fourth proportional to 328,514.32, 492,771.48 and 128,928.70 is: 193,393.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,514.32 : 492,771.48 = 128,928.70 : x
  2. Step 2: Convert to fraction form
    328,514.32/492,771.48 = 128,928.70/x
  3. Step 3: Cross multiply
    328,514.32x = 492,771.48 × 128,928.70
  4. Step 4: Simplify right side
    328,514.32x = 63,532,386,313.48
  5. Step 5: Solve for x
    x = 63,532,386,313.48/328,514.32
  6. Step 6: Final answer
    x = 193,393.05

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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.