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Finding the Fourth Proportional to 646,674.76, 892,446.96 and 388,630.63

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Solution

The fourth proportional to 646,674.76, 892,446.96 and 388,630.63 is: 536,331.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,674.76 : 892,446.96 = 388,630.63 : x
  2. Step 2: Convert to fraction form
    646,674.76/892,446.96 = 388,630.63/x
  3. Step 3: Cross multiply
    646,674.76x = 892,446.96 × 388,630.63
  4. Step 4: Simplify right side
    646,674.76x = 346,832,224,306.39
  5. Step 5: Solve for x
    x = 346,832,224,306.39/646,674.76
  6. Step 6: Final answer
    x = 536,331.78

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Double scale
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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.