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Finding the Fourth Proportional to 607.28, 838.12 and 345.36

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Solution

The fourth proportional to 607.28, 838.12 and 345.36 is: 476.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.28 : 838.12 = 345.36 : x
  2. Step 2: Convert to fraction form
    607.28/838.12 = 345.36/x
  3. Step 3: Cross multiply
    607.28x = 838.12 × 345.36
  4. Step 4: Simplify right side
    607.28x = 289,453.12
  5. Step 5: Solve for x
    x = 289,453.12/607.28
  6. Step 6: Final answer
    x = 476.64

Related Problems

Find fourth proportional to 303.64, 419.06 and 172.68
Half scale
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Double scale
Find fourth proportional to 608.28, 839.50 and 346.36
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.