Home / 687,554.20-948,799.74-381,644.20

Finding the Fourth Proportional to 687,554.20, 948,799.74 and 381,644.20

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Solution

The fourth proportional to 687,554.20, 948,799.74 and 381,644.20 is: 526,655.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,554.20 : 948,799.74 = 381,644.20 : x
  2. Step 2: Convert to fraction form
    687,554.20/948,799.74 = 381,644.20/x
  3. Step 3: Cross multiply
    687,554.20x = 948,799.74 × 381,644.20
  4. Step 4: Simplify right side
    687,554.20x = 362,103,917,732.51
  5. Step 5: Solve for x
    x = 362,103,917,732.51/687,554.20
  6. Step 6: Final answer
    x = 526,655.09

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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.