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Finding the Fourth Proportional to 380,525.17, 525,133.21 and 217,178.42

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Solution

The fourth proportional to 380,525.17, 525,133.21 and 217,178.42 is: 299,711.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,525.17 : 525,133.21 = 217,178.42 : x
  2. Step 2: Convert to fraction form
    380,525.17/525,133.21 = 217,178.42/x
  3. Step 3: Cross multiply
    380,525.17x = 525,133.21 × 217,178.42
  4. Step 4: Simplify right side
    380,525.17x = 114,047,597,668.72
  5. Step 5: Solve for x
    x = 114,047,597,668.72/380,525.17
  6. Step 6: Final answer
    x = 299,711.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.