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Finding the Fourth Proportional to 443,391.80, 665,087.70 and 265,807.40

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Solution

The fourth proportional to 443,391.80, 665,087.70 and 265,807.40 is: 398,711.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,391.80 : 665,087.70 = 265,807.40 : x
  2. Step 2: Convert to fraction form
    443,391.80/665,087.70 = 265,807.40/x
  3. Step 3: Cross multiply
    443,391.80x = 665,087.70 × 265,807.40
  4. Step 4: Simplify right side
    443,391.80x = 176,785,232,308.98
  5. Step 5: Solve for x
    x = 176,785,232,308.98/443,391.80
  6. Step 6: Final answer
    x = 398,711.10

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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.