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Finding the Fourth Proportional to 622.76, 859.34 and 360.72

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Solution

The fourth proportional to 622.76, 859.34 and 360.72 is: 497.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.76 : 859.34 = 360.72 : x
  2. Step 2: Convert to fraction form
    622.76/859.34 = 360.72/x
  3. Step 3: Cross multiply
    622.76x = 859.34 × 360.72
  4. Step 4: Simplify right side
    622.76x = 309,982.03
  5. Step 5: Solve for x
    x = 309,982.03/622.76
  6. Step 6: Final answer
    x = 497.76

Related Problems

Find fourth proportional to 311.38, 429.67 and 180.36
Half scale
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Double scale
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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.