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Finding the Fourth Proportional to 386,400.60, 579,600.90 and 329,319.90

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Solution

The fourth proportional to 386,400.60, 579,600.90 and 329,319.90 is: 493,979.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,400.60 : 579,600.90 = 329,319.90 : x
  2. Step 2: Convert to fraction form
    386,400.60/579,600.90 = 329,319.90/x
  3. Step 3: Cross multiply
    386,400.60x = 579,600.90 × 329,319.90
  4. Step 4: Simplify right side
    386,400.60x = 190,874,110,427.91
  5. Step 5: Solve for x
    x = 190,874,110,427.91/386,400.60
  6. Step 6: Final answer
    x = 493,979.85

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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.