Home / 643,617.36-888,233.67-357,138.18

Finding the Fourth Proportional to 643,617.36, 888,233.67 and 357,138.18

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Solution

The fourth proportional to 643,617.36, 888,233.67 and 357,138.18 is: 492,873.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,617.36 : 888,233.67 = 357,138.18 : x
  2. Step 2: Convert to fraction form
    643,617.36/888,233.67 = 357,138.18/x
  3. Step 3: Cross multiply
    643,617.36x = 888,233.67 × 357,138.18
  4. Step 4: Simplify right side
    643,617.36x = 317,222,156,318.52
  5. Step 5: Solve for x
    x = 317,222,156,318.52/643,617.36
  6. Step 6: Final answer
    x = 492,873.83

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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.