Home / 687,142.36-948,062.64-445,435.12

Finding the Fourth Proportional to 687,142.36, 948,062.64 and 445,435.12

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Solution

The fourth proportional to 687,142.36, 948,062.64 and 445,435.12 is: 614,574.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,142.36 : 948,062.64 = 445,435.12 : x
  2. Step 2: Convert to fraction form
    687,142.36/948,062.64 = 445,435.12/x
  3. Step 3: Cross multiply
    687,142.36x = 948,062.64 × 445,435.12
  4. Step 4: Simplify right side
    687,142.36x = 422,300,395,815.92
  5. Step 5: Solve for x
    x = 422,300,395,815.92/687,142.36
  6. Step 6: Final answer
    x = 614,574.83

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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.