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Finding the Fourth Proportional to 386,475.70, 579,713.55 and 228,622.90

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Solution

The fourth proportional to 386,475.70, 579,713.55 and 228,622.90 is: 342,934.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,475.70 : 579,713.55 = 228,622.90 : x
  2. Step 2: Convert to fraction form
    386,475.70/579,713.55 = 228,622.90/x
  3. Step 3: Cross multiply
    386,475.70x = 579,713.55 × 228,622.90
  4. Step 4: Simplify right side
    386,475.70x = 132,535,792,970.30
  5. Step 5: Solve for x
    x = 132,535,792,970.30/386,475.70
  6. Step 6: Final answer
    x = 342,934.35

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Similar ratio
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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.