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Finding the Fourth Proportional to 315.76, 473.40 and 262

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Solution

The fourth proportional to 315.76, 473.40 and 262 is: 392.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.76 : 473.40 = 262 : x
  2. Step 2: Convert to fraction form
    315.76/473.40 = 262/x
  3. Step 3: Cross multiply
    315.76x = 473.40 × 262
  4. Step 4: Simplify right side
    315.76x = 124,030.80
  5. Step 5: Solve for x
    x = 124,030.80/315.76
  6. Step 6: Final answer
    x = 392.80

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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.