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Finding the Fourth Proportional to 381,720.40, 526,838.95 and 220,668.81

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Solution

The fourth proportional to 381,720.40, 526,838.95 and 220,668.81 is: 304,560.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,720.40 : 526,838.95 = 220,668.81 : x
  2. Step 2: Convert to fraction form
    381,720.40/526,838.95 = 220,668.81/x
  3. Step 3: Cross multiply
    381,720.40x = 526,838.95 × 220,668.81
  4. Step 4: Simplify right side
    381,720.40x = 116,256,922,458.34
  5. Step 5: Solve for x
    x = 116,256,922,458.34/381,720.40
  6. Step 6: Final answer
    x = 304,560.41

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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.