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Finding the Fourth Proportional to 431,031.20, 646,546.80 and 164,800.40

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Solution

The fourth proportional to 431,031.20, 646,546.80 and 164,800.40 is: 247,200.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,031.20 : 646,546.80 = 164,800.40 : x
  2. Step 2: Convert to fraction form
    431,031.20/646,546.80 = 164,800.40/x
  3. Step 3: Cross multiply
    431,031.20x = 646,546.80 × 164,800.40
  4. Step 4: Simplify right side
    431,031.20x = 106,551,171,258.72
  5. Step 5: Solve for x
    x = 106,551,171,258.72/431,031.20
  6. Step 6: Final answer
    x = 247,200.60

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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.