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Finding the Fourth Proportional to 607.88, 838.88 and 345.88

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Solution

The fourth proportional to 607.88, 838.88 and 345.88 is: 477.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.88 : 838.88 = 345.88 : x
  2. Step 2: Convert to fraction form
    607.88/838.88 = 345.88/x
  3. Step 3: Cross multiply
    607.88x = 838.88 × 345.88
  4. Step 4: Simplify right side
    607.88x = 290,151.81
  5. Step 5: Solve for x
    x = 290,151.81/607.88
  6. Step 6: Final answer
    x = 477.32

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Half scale
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Double scale
Find fourth proportional to 608.88, 840.26 and 346.88
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.