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Finding the Fourth Proportional to 275,685.90, 380,429.15 and 154,824.08

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Solution

The fourth proportional to 275,685.90, 380,429.15 and 154,824.08 is: 213,647.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,685.90 : 380,429.15 = 154,824.08 : x
  2. Step 2: Convert to fraction form
    275,685.90/380,429.15 = 154,824.08/x
  3. Step 3: Cross multiply
    275,685.90x = 380,429.15 × 154,824.08
  4. Step 4: Simplify right side
    275,685.90x = 58,899,590,477.67
  5. Step 5: Solve for x
    x = 58,899,590,477.67/275,685.90
  6. Step 6: Final answer
    x = 213,647.45

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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.