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Finding the Fourth Proportional to 357,290.21, 535,527.59 and 143,921.43

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Solution

The fourth proportional to 357,290.21, 535,527.59 and 143,921.43 is: 215,717.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,290.21 : 535,527.59 = 143,921.43 : x
  2. Step 2: Convert to fraction form
    357,290.21/535,527.59 = 143,921.43/x
  3. Step 3: Cross multiply
    357,290.21x = 535,527.59 × 143,921.43
  4. Step 4: Simplify right side
    357,290.21x = 77,073,895,837.65
  5. Step 5: Solve for x
    x = 77,073,895,837.65/357,290.21
  6. Step 6: Final answer
    x = 215,717.90

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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.