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Finding the Fourth Proportional to 313.15, 469.32 and 210.28

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Solution

The fourth proportional to 313.15, 469.32 and 210.28 is: 315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.15 : 469.32 = 210.28 : x
  2. Step 2: Convert to fraction form
    313.15/469.32 = 210.28/x
  3. Step 3: Cross multiply
    313.15x = 469.32 × 210.28
  4. Step 4: Simplify right side
    313.15x = 98,688.61
  5. Step 5: Solve for x
    x = 98,688.61/313.15
  6. Step 6: Final answer
    x = 315.15

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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.