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Finding the Fourth Proportional to 522.46, 720.93 and 312.67

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Solution

The fourth proportional to 522.46, 720.93 and 312.67 is: 431.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.46 : 720.93 = 312.67 : x
  2. Step 2: Convert to fraction form
    522.46/720.93 = 312.67/x
  3. Step 3: Cross multiply
    522.46x = 720.93 × 312.67
  4. Step 4: Simplify right side
    522.46x = 225,413.18
  5. Step 5: Solve for x
    x = 225,413.18/522.46
  6. Step 6: Final answer
    x = 431.45

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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.