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Finding the Fourth Proportional to 501.16, 751.74 and 212.40

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Solution

The fourth proportional to 501.16, 751.74 and 212.40 is: 318.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.16 : 751.74 = 212.40 : x
  2. Step 2: Convert to fraction form
    501.16/751.74 = 212.40/x
  3. Step 3: Cross multiply
    501.16x = 751.74 × 212.40
  4. Step 4: Simplify right side
    501.16x = 159,669.58
  5. Step 5: Solve for x
    x = 159,669.58/501.16
  6. Step 6: Final answer
    x = 318.60

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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.