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Finding the Fourth Proportional to 207.85, 286.58 and 152.50

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Solution

The fourth proportional to 207.85, 286.58 and 152.50 is: 210.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.85 : 286.58 = 152.50 : x
  2. Step 2: Convert to fraction form
    207.85/286.58 = 152.50/x
  3. Step 3: Cross multiply
    207.85x = 286.58 × 152.50
  4. Step 4: Simplify right side
    207.85x = 43,701.37
  5. Step 5: Solve for x
    x = 43,701.37/207.85
  6. Step 6: Final answer
    x = 210.25

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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.