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Finding the Fourth Proportional to 328,553.72, 492,883.74 and 128,765.76

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Solution

The fourth proportional to 328,553.72, 492,883.74 and 128,765.76 is: 193,169.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,553.72 : 492,883.74 = 128,765.76 : x
  2. Step 2: Convert to fraction form
    328,553.72/492,883.74 = 128,765.76/x
  3. Step 3: Cross multiply
    328,553.72x = 492,883.74 × 128,765.76
  4. Step 4: Simplify right side
    328,553.72x = 63,466,549,372.74
  5. Step 5: Solve for x
    x = 63,466,549,372.74/328,553.72
  6. Step 6: Final answer
    x = 193,169.47

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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.