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Finding the Fourth Proportional to 607.47, 838.31 and 345.45

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Solution

The fourth proportional to 607.47, 838.31 and 345.45 is: 476.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.47 : 838.31 = 345.45 : x
  2. Step 2: Convert to fraction form
    607.47/838.31 = 345.45/x
  3. Step 3: Cross multiply
    607.47x = 838.31 × 345.45
  4. Step 4: Simplify right side
    607.47x = 289,594.19
  5. Step 5: Solve for x
    x = 289,594.19/607.47
  6. Step 6: Final answer
    x = 476.72

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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.