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Finding the Fourth Proportional to 443,396.80, 665,095.20 and 265,812.40

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Solution

The fourth proportional to 443,396.80, 665,095.20 and 265,812.40 is: 398,718.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,396.80 : 665,095.20 = 265,812.40 : x
  2. Step 2: Convert to fraction form
    443,396.80/665,095.20 = 265,812.40/x
  3. Step 3: Cross multiply
    443,396.80x = 665,095.20 × 265,812.40
  4. Step 4: Simplify right side
    443,396.80x = 176,790,551,340.48
  5. Step 5: Solve for x
    x = 176,790,551,340.48/443,396.80
  6. Step 6: Final answer
    x = 398,718.60

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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.