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Finding the Fourth Proportional to 281,354.55, 388,279.07 and 154,031.05

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Solution

The fourth proportional to 281,354.55, 388,279.07 and 154,031.05 is: 212,568.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,354.55 : 388,279.07 = 154,031.05 : x
  2. Step 2: Convert to fraction form
    281,354.55/388,279.07 = 154,031.05/x
  3. Step 3: Cross multiply
    281,354.55x = 388,279.07 × 154,031.05
  4. Step 4: Simplify right side
    281,354.55x = 59,807,032,845.12
  5. Step 5: Solve for x
    x = 59,807,032,845.12/281,354.55
  6. Step 6: Final answer
    x = 212,568.21

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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.