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Finding the Fourth Proportional to 285,614.20, 428,421.30 and 259,370.20

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Solution

The fourth proportional to 285,614.20, 428,421.30 and 259,370.20 is: 389,055.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,614.20 : 428,421.30 = 259,370.20 : x
  2. Step 2: Convert to fraction form
    285,614.20/428,421.30 = 259,370.20/x
  3. Step 3: Cross multiply
    285,614.20x = 428,421.30 × 259,370.20
  4. Step 4: Simplify right side
    285,614.20x = 111,119,718,265.26
  5. Step 5: Solve for x
    x = 111,119,718,265.26/285,614.20
  6. Step 6: Final answer
    x = 389,055.30

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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.