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Finding the Fourth Proportional to 281,370.55, 388,276.05 and 154,021.54

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Solution

The fourth proportional to 281,370.55, 388,276.05 and 154,021.54 is: 212,541.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,370.55 : 388,276.05 = 154,021.54 : x
  2. Step 2: Convert to fraction form
    281,370.55/388,276.05 = 154,021.54/x
  3. Step 3: Cross multiply
    281,370.55x = 388,276.05 × 154,021.54
  4. Step 4: Simplify right side
    281,370.55x = 59,802,875,166.12
  5. Step 5: Solve for x
    x = 59,802,875,166.12/281,370.55
  6. Step 6: Final answer
    x = 212,541.35

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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.