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Finding the Fourth Proportional to 316.61, 436.62 and 210.10

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Solution

The fourth proportional to 316.61, 436.62 and 210.10 is: 289.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.61 : 436.62 = 210.10 : x
  2. Step 2: Convert to fraction form
    316.61/436.62 = 210.10/x
  3. Step 3: Cross multiply
    316.61x = 436.62 × 210.10
  4. Step 4: Simplify right side
    316.61x = 91,732.81
  5. Step 5: Solve for x
    x = 91,732.81/316.61
  6. Step 6: Final answer
    x = 289.74

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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.