Home / 687,480.05-948,708.18-381,538.67

Finding the Fourth Proportional to 687,480.05, 948,708.18 and 381,538.67

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Solution

The fourth proportional to 687,480.05, 948,708.18 and 381,538.67 is: 526,515.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,480.05 : 948,708.18 = 381,538.67 : x
  2. Step 2: Convert to fraction form
    687,480.05/948,708.18 = 381,538.67/x
  3. Step 3: Cross multiply
    687,480.05x = 948,708.18 × 381,538.67
  4. Step 4: Simplify right side
    687,480.05x = 361,968,852,471.78
  5. Step 5: Solve for x
    x = 361,968,852,471.78/687,480.05
  6. Step 6: Final answer
    x = 526,515.43

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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.