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Finding the Fourth Proportional to 607.54, 838.40 and 345.55

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Solution

The fourth proportional to 607.54, 838.40 and 345.55 is: 476.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.54 : 838.40 = 345.55 : x
  2. Step 2: Convert to fraction form
    607.54/838.40 = 345.55/x
  3. Step 3: Cross multiply
    607.54x = 838.40 × 345.55
  4. Step 4: Simplify right side
    607.54x = 289,703.20
  5. Step 5: Solve for x
    x = 289,703.20/607.54
  6. Step 6: Final answer
    x = 476.85

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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.