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Finding the Fourth Proportional to 285,959.40, 428,939.10 and 108,407.40

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Solution

The fourth proportional to 285,959.40, 428,939.10 and 108,407.40 is: 162,611.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,959.40 : 428,939.10 = 108,407.40 : x
  2. Step 2: Convert to fraction form
    285,959.40/428,939.10 = 108,407.40/x
  3. Step 3: Cross multiply
    285,959.40x = 428,939.10 × 108,407.40
  4. Step 4: Simplify right side
    285,959.40x = 46,500,172,589.34
  5. Step 5: Solve for x
    x = 46,500,172,589.34/285,959.40
  6. Step 6: Final answer
    x = 162,611.10

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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.