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Finding the Fourth Proportional to 315.47, 435.26 and 210.58

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Solution

The fourth proportional to 315.47, 435.26 and 210.58 is: 290.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.47 : 435.26 = 210.58 : x
  2. Step 2: Convert to fraction form
    315.47/435.26 = 210.58/x
  3. Step 3: Cross multiply
    315.47x = 435.26 × 210.58
  4. Step 4: Simplify right side
    315.47x = 91,656.49
  5. Step 5: Solve for x
    x = 91,656.49/315.47
  6. Step 6: Final answer
    x = 290.54

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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.