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Finding the Fourth Proportional to 431,270.40, 646,905.60 and 325,516.80

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Solution

The fourth proportional to 431,270.40, 646,905.60 and 325,516.80 is: 488,275.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,270.40 : 646,905.60 = 325,516.80 : x
  2. Step 2: Convert to fraction form
    431,270.40/646,905.60 = 325,516.80/x
  3. Step 3: Cross multiply
    431,270.40x = 646,905.60 × 325,516.80
  4. Step 4: Simplify right side
    431,270.40x = 210,578,640,814.08
  5. Step 5: Solve for x
    x = 210,578,640,814.08/431,270.40
  6. Step 6: Final answer
    x = 488,275.20

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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.