Home / 687,668.10-948,934.41-381,720.42

Finding the Fourth Proportional to 687,668.10, 948,934.41 and 381,720.42

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Solution

The fourth proportional to 687,668.10, 948,934.41 and 381,720.42 is: 526,747.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,668.10 : 948,934.41 = 381,720.42 : x
  2. Step 2: Convert to fraction form
    687,668.10/948,934.41 = 381,720.42/x
  3. Step 3: Cross multiply
    687,668.10x = 948,934.41 × 381,720.42
  4. Step 4: Simplify right side
    687,668.10x = 362,227,641,537.65
  5. Step 5: Solve for x
    x = 362,227,641,537.65/687,668.10
  6. Step 6: Final answer
    x = 526,747.77

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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.