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Finding the Fourth Proportional to 257,223.40, 385,604.70 and 168,519.40

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Solution

The fourth proportional to 257,223.40, 385,604.70 and 168,519.40 is: 252,628.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,223.40 : 385,604.70 = 168,519.40 : x
  2. Step 2: Convert to fraction form
    257,223.40/385,604.70 = 168,519.40/x
  3. Step 3: Cross multiply
    257,223.40x = 385,604.70 × 168,519.40
  4. Step 4: Simplify right side
    257,223.40x = 64,981,872,681.18
  5. Step 5: Solve for x
    x = 64,981,872,681.18/257,223.40
  6. Step 6: Final answer
    x = 252,628.15

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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.