Home / 687,511.53-948,758.72-381,590.55

Finding the Fourth Proportional to 687,511.53, 948,758.72 and 381,590.55

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Solution

The fourth proportional to 687,511.53, 948,758.72 and 381,590.55 is: 526,590.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,511.53 : 948,758.72 = 381,590.55 : x
  2. Step 2: Convert to fraction form
    687,511.53/948,758.72 = 381,590.55/x
  3. Step 3: Cross multiply
    687,511.53x = 948,758.72 × 381,590.55
  4. Step 4: Simplify right side
    687,511.53x = 362,037,359,874.14
  5. Step 5: Solve for x
    x = 362,037,359,874.14/687,511.53
  6. Step 6: Final answer
    x = 526,590.96

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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.