Home / 861,104.28-1,291,662.90-300,139.32

Finding the Fourth Proportional to 861,104.28, 1,291,662.90 and 300,139.32

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Solution

The fourth proportional to 861,104.28, 1,291,662.90 and 300,139.32 is: 450,211.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,104.28 : 1,291,662.90 = 300,139.32 : x
  2. Step 2: Convert to fraction form
    861,104.28/1,291,662.90 = 300,139.32/x
  3. Step 3: Cross multiply
    861,104.28x = 1,291,662.90 × 300,139.32
  4. Step 4: Simplify right side
    861,104.28x = 387,678,824,475.23
  5. Step 5: Solve for x
    x = 387,678,824,475.23/861,104.28
  6. Step 6: Final answer
    x = 450,211.24

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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.