Home / 280,430.13-386,991.56-153,105.72

Finding the Fourth Proportional to 280,430.13, 386,991.56 and 153,105.72

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Solution

The fourth proportional to 280,430.13, 386,991.56 and 153,105.72 is: 211,284.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,430.13 : 386,991.56 = 153,105.72 : x
  2. Step 2: Convert to fraction form
    280,430.13/386,991.56 = 153,105.72/x
  3. Step 3: Cross multiply
    280,430.13x = 386,991.56 × 153,105.72
  4. Step 4: Simplify right side
    280,430.13x = 59,250,620,662.19
  5. Step 5: Solve for x
    x = 59,250,620,662.19/280,430.13
  6. Step 6: Final answer
    x = 211,284.79

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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.