Home / 865,666.41-1,298,564.88-258,406.76

Finding the Fourth Proportional to 865,666.41, 1,298,564.88 and 258,406.76

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Solution

The fourth proportional to 865,666.41, 1,298,564.88 and 258,406.76 is: 387,629.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,666.41 : 1,298,564.88 = 258,406.76 : x
  2. Step 2: Convert to fraction form
    865,666.41/1,298,564.88 = 258,406.76/x
  3. Step 3: Cross multiply
    865,666.41x = 1,298,564.88 × 258,406.76
  4. Step 4: Simplify right side
    865,666.41x = 335,557,936,797.76
  5. Step 5: Solve for x
    x = 335,557,936,797.76/865,666.41
  6. Step 6: Final answer
    x = 387,629.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.