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Finding the Fourth Proportional to 602.88, 830.86 and 492

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Solution

The fourth proportional to 602.88, 830.86 and 492 is: 678.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.88 : 830.86 = 492 : x
  2. Step 2: Convert to fraction form
    602.88/830.86 = 492/x
  3. Step 3: Cross multiply
    602.88x = 830.86 × 492
  4. Step 4: Simplify right side
    602.88x = 408,783.12
  5. Step 5: Solve for x
    x = 408,783.12/602.88
  6. Step 6: Final answer
    x = 678.05

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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.