Home / 643,504.30-888,142.53-357,116.38

Finding the Fourth Proportional to 643,504.30, 888,142.53 and 357,116.38

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Solution

The fourth proportional to 643,504.30, 888,142.53 and 357,116.38 is: 492,879.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,504.30 : 888,142.53 = 357,116.38 : x
  2. Step 2: Convert to fraction form
    643,504.30/888,142.53 = 357,116.38/x
  3. Step 3: Cross multiply
    643,504.30x = 888,142.53 × 357,116.38
  4. Step 4: Simplify right side
    643,504.30x = 317,170,245,237.64
  5. Step 5: Solve for x
    x = 317,170,245,237.64/643,504.30
  6. Step 6: Final answer
    x = 492,879.76

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Double scale
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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.