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Finding the Fourth Proportional to 285,109.72, 393,448.42 and 154,284.51

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Solution

The fourth proportional to 285,109.72, 393,448.42 and 154,284.51 is: 212,911.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,109.72 : 393,448.42 = 154,284.51 : x
  2. Step 2: Convert to fraction form
    285,109.72/393,448.42 = 154,284.51/x
  3. Step 3: Cross multiply
    285,109.72x = 393,448.42 × 154,284.51
  4. Step 4: Simplify right side
    285,109.72x = 60,702,998,358.26
  5. Step 5: Solve for x
    x = 60,702,998,358.26/285,109.72
  6. Step 6: Final answer
    x = 212,911.01

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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.