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Finding the Fourth Proportional to 309,698.76, 427,358.66 and 173,713.80

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Solution

The fourth proportional to 309,698.76, 427,358.66 and 173,713.80 is: 239,710.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,698.76 : 427,358.66 = 173,713.80 : x
  2. Step 2: Convert to fraction form
    309,698.76/427,358.66 = 173,713.80/x
  3. Step 3: Cross multiply
    309,698.76x = 427,358.66 × 173,713.80
  4. Step 4: Simplify right side
    309,698.76x = 74,238,096,791.51
  5. Step 5: Solve for x
    x = 74,238,096,791.51/309,698.76
  6. Step 6: Final answer
    x = 239,710.67

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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.