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Finding the Fourth Proportional to 470.90, 706.16 and 210.98

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Solution

The fourth proportional to 470.90, 706.16 and 210.98 is: 316.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.90 : 706.16 = 210.98 : x
  2. Step 2: Convert to fraction form
    470.90/706.16 = 210.98/x
  3. Step 3: Cross multiply
    470.90x = 706.16 × 210.98
  4. Step 4: Simplify right side
    470.90x = 148,985.64
  5. Step 5: Solve for x
    x = 148,985.64/470.90
  6. Step 6: Final answer
    x = 316.38

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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.