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Finding the Fourth Proportional to 607.44, 838.68 and 386.76

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Solution

The fourth proportional to 607.44, 838.68 and 386.76 is: 533.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.44 : 838.68 = 386.76 : x
  2. Step 2: Convert to fraction form
    607.44/838.68 = 386.76/x
  3. Step 3: Cross multiply
    607.44x = 838.68 × 386.76
  4. Step 4: Simplify right side
    607.44x = 324,367.88
  5. Step 5: Solve for x
    x = 324,367.88/607.44
  6. Step 6: Final answer
    x = 533.99

Related Problems

Find fourth proportional to 303.72, 419.34 and 193.38
Half scale
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Double scale
Find fourth proportional to 608.44, 840.06 and 387.76
Similar ratio
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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.