Home / 913,120.05-1,260,142.74-505,215.27

Finding the Fourth Proportional to 913,120.05, 1,260,142.74 and 505,215.27

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Solution

The fourth proportional to 913,120.05, 1,260,142.74 and 505,215.27 is: 697,217.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    913,120.05 : 1,260,142.74 = 505,215.27 : x
  2. Step 2: Convert to fraction form
    913,120.05/1,260,142.74 = 505,215.27/x
  3. Step 3: Cross multiply
    913,120.05x = 1,260,142.74 × 505,215.27
  4. Step 4: Simplify right side
    913,120.05x = 636,643,354,627.64
  5. Step 5: Solve for x
    x = 636,643,354,627.64/913,120.05
  6. Step 6: Final answer
    x = 697,217.58

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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.