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Finding the Fourth Proportional to 381,764.20, 572,646.30 and 310,905.40

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Solution

The fourth proportional to 381,764.20, 572,646.30 and 310,905.40 is: 466,358.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,764.20 : 572,646.30 = 310,905.40 : x
  2. Step 2: Convert to fraction form
    381,764.20/572,646.30 = 310,905.40/x
  3. Step 3: Cross multiply
    381,764.20x = 572,646.30 × 310,905.40
  4. Step 4: Simplify right side
    381,764.20x = 178,038,826,960.02
  5. Step 5: Solve for x
    x = 178,038,826,960.02/381,764.20
  6. Step 6: Final answer
    x = 466,358.10

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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.