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Finding the Fourth Proportional to 386,502.80, 579,466.20 and 199,648.40

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Solution

The fourth proportional to 386,502.80, 579,466.20 and 199,648.40 is: 299,323.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,502.80 : 579,466.20 = 199,648.40 : x
  2. Step 2: Convert to fraction form
    386,502.80/579,466.20 = 199,648.40/x
  3. Step 3: Cross multiply
    386,502.80x = 579,466.20 × 199,648.40
  4. Step 4: Simplify right side
    386,502.80x = 115,689,499,684.08
  5. Step 5: Solve for x
    x = 115,689,499,684.08/386,502.80
  6. Step 6: Final answer
    x = 299,323.83

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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.