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Finding the Fourth Proportional to 431,331.60, 645,461.40 and 273,635.60

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Solution

The fourth proportional to 431,331.60, 645,461.40 and 273,635.60 is: 409,478.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,331.60 : 645,461.40 = 273,635.60 : x
  2. Step 2: Convert to fraction form
    431,331.60/645,461.40 = 273,635.60/x
  3. Step 3: Cross multiply
    431,331.60x = 645,461.40 × 273,635.60
  4. Step 4: Simplify right side
    431,331.60x = 176,621,217,465.84
  5. Step 5: Solve for x
    x = 176,621,217,465.84/431,331.60
  6. Step 6: Final answer
    x = 409,478.97

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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.