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Finding the Fourth Proportional to 622.51, 859.03 and 342.75

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Solution

The fourth proportional to 622.51, 859.03 and 342.75 is: 472.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.51 : 859.03 = 342.75 : x
  2. Step 2: Convert to fraction form
    622.51/859.03 = 342.75/x
  3. Step 3: Cross multiply
    622.51x = 859.03 × 342.75
  4. Step 4: Simplify right side
    622.51x = 294,432.53
  5. Step 5: Solve for x
    x = 294,432.53/622.51
  6. Step 6: Final answer
    x = 472.98

Related Problems

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Half scale
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Double scale
Find fourth proportional to 623.51, 860.41 and 343.75
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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.