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Finding the Fourth Proportional to 443,397.80, 665,096.70 and 265,813.40

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Solution

The fourth proportional to 443,397.80, 665,096.70 and 265,813.40 is: 398,720.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,397.80 : 665,096.70 = 265,813.40 : x
  2. Step 2: Convert to fraction form
    443,397.80/665,096.70 = 265,813.40/x
  3. Step 3: Cross multiply
    443,397.80x = 665,096.70 × 265,813.40
  4. Step 4: Simplify right side
    443,397.80x = 176,791,615,155.78
  5. Step 5: Solve for x
    x = 176,791,615,155.78/443,397.80
  6. Step 6: Final answer
    x = 398,720.10

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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.