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Finding the Fourth Proportional to 646,019.20, 969,604.80 and 379,446.40

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Solution

The fourth proportional to 646,019.20, 969,604.80 and 379,446.40 is: 569,507.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,019.20 : 969,604.80 = 379,446.40 : x
  2. Step 2: Convert to fraction form
    646,019.20/969,604.80 = 379,446.40/x
  3. Step 3: Cross multiply
    646,019.20x = 969,604.80 × 379,446.40
  4. Step 4: Simplify right side
    646,019.20x = 367,913,050,782.72
  5. Step 5: Solve for x
    x = 367,913,050,782.72/646,019.20
  6. Step 6: Final answer
    x = 569,507.92

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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.