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Finding the Fourth Proportional to 315.02, 434.67 and 210.26

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Solution

The fourth proportional to 315.02, 434.67 and 210.26 is: 290.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.02 : 434.67 = 210.26 : x
  2. Step 2: Convert to fraction form
    315.02/434.67 = 210.26/x
  3. Step 3: Cross multiply
    315.02x = 434.67 × 210.26
  4. Step 4: Simplify right side
    315.02x = 91,393.71
  5. Step 5: Solve for x
    x = 91,393.71/315.02
  6. Step 6: Final answer
    x = 290.12

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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.