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Finding the Fourth Proportional to 400,763.92, 553,043.50 and 228,678.76

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Solution

The fourth proportional to 400,763.92, 553,043.50 and 228,678.76 is: 315,570.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,763.92 : 553,043.50 = 228,678.76 : x
  2. Step 2: Convert to fraction form
    400,763.92/553,043.50 = 228,678.76/x
  3. Step 3: Cross multiply
    400,763.92x = 553,043.50 × 228,678.76
  4. Step 4: Simplify right side
    400,763.92x = 126,469,299,280.06
  5. Step 5: Solve for x
    x = 126,469,299,280.06/400,763.92
  6. Step 6: Final answer
    x = 315,570.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.