Home / 687,555.20-948,801.12-381,645.20

Finding the Fourth Proportional to 687,555.20, 948,801.12 and 381,645.20

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Solution

The fourth proportional to 687,555.20, 948,801.12 and 381,645.20 is: 526,656.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,555.20 : 948,801.12 = 381,645.20 : x
  2. Step 2: Convert to fraction form
    687,555.20/948,801.12 = 381,645.20/x
  3. Step 3: Cross multiply
    687,555.20x = 948,801.12 × 381,645.20
  4. Step 4: Simplify right side
    687,555.20x = 362,105,393,202.62
  5. Step 5: Solve for x
    x = 362,105,393,202.62/687,555.20
  6. Step 6: Final answer
    x = 526,656.47

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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.