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Finding the Fourth Proportional to 628.69, 867.59 and 348.93

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Solution

The fourth proportional to 628.69, 867.59 and 348.93 is: 481.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.69 : 867.59 = 348.93 : x
  2. Step 2: Convert to fraction form
    628.69/867.59 = 348.93/x
  3. Step 3: Cross multiply
    628.69x = 867.59 × 348.93
  4. Step 4: Simplify right side
    628.69x = 302,728.18
  5. Step 5: Solve for x
    x = 302,728.18/628.69
  6. Step 6: Final answer
    x = 481.52

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Double scale
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1.5x scale

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.