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Finding the Fourth Proportional to 607.79, 838.79 and 342.26

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Solution

The fourth proportional to 607.79, 838.79 and 342.26 is: 472.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.79 : 838.79 = 342.26 : x
  2. Step 2: Convert to fraction form
    607.79/838.79 = 342.26/x
  3. Step 3: Cross multiply
    607.79x = 838.79 × 342.26
  4. Step 4: Simplify right side
    607.79x = 287,084.27
  5. Step 5: Solve for x
    x = 287,084.27/607.79
  6. Step 6: Final answer
    x = 472.34

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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.