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Finding the Fourth Proportional to 622.32, 858.84 and 356.76

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Solution

The fourth proportional to 622.32, 858.84 and 356.76 is: 492.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.32 : 858.84 = 356.76 : x
  2. Step 2: Convert to fraction form
    622.32/858.84 = 356.76/x
  3. Step 3: Cross multiply
    622.32x = 858.84 × 356.76
  4. Step 4: Simplify right side
    622.32x = 306,399.76
  5. Step 5: Solve for x
    x = 306,399.76/622.32
  6. Step 6: Final answer
    x = 492.35

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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.