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Finding the Fourth Proportional to 628.58, 867.36 and 348.77

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Solution

The fourth proportional to 628.58, 867.36 and 348.77 is: 481.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.58 : 867.36 = 348.77 : x
  2. Step 2: Convert to fraction form
    628.58/867.36 = 348.77/x
  3. Step 3: Cross multiply
    628.58x = 867.36 × 348.77
  4. Step 4: Simplify right side
    628.58x = 302,504.81
  5. Step 5: Solve for x
    x = 302,504.81/628.58
  6. Step 6: Final answer
    x = 481.25

Related Problems

Find fourth proportional to 314.29, 433.68 and 174.38
Half scale
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Double scale
Find fourth proportional to 629.58, 868.74 and 349.77
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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.