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Finding the Fourth Proportional to 954.50, 1,431.93 and 270.50

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Solution

The fourth proportional to 954.50, 1,431.93 and 270.50 is: 405.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.50 : 1,431.93 = 270.50 : x
  2. Step 2: Convert to fraction form
    954.50/1,431.93 = 270.50/x
  3. Step 3: Cross multiply
    954.50x = 1,431.93 × 270.50
  4. Step 4: Simplify right side
    954.50x = 387,337.07
  5. Step 5: Solve for x
    x = 387,337.07/954.50
  6. Step 6: Final answer
    x = 405.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.