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Finding the Fourth Proportional to 628.53, 867.36 and 348.76

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Solution

The fourth proportional to 628.53, 867.36 and 348.76 is: 481.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.53 : 867.36 = 348.76 : x
  2. Step 2: Convert to fraction form
    628.53/867.36 = 348.76/x
  3. Step 3: Cross multiply
    628.53x = 867.36 × 348.76
  4. Step 4: Simplify right side
    628.53x = 302,502.87
  5. Step 5: Solve for x
    x = 302,502.87/628.53
  6. Step 6: Final answer
    x = 481.29

Related Problems

Find fourth proportional to 314.26, 433.68 and 174.38
Half scale
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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.