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Finding the Fourth Proportional to 626.56, 864.58 and 346.76

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Solution

The fourth proportional to 626.56, 864.58 and 346.76 is: 478.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.56 : 864.58 = 346.76 : x
  2. Step 2: Convert to fraction form
    626.56/864.58 = 346.76/x
  3. Step 3: Cross multiply
    626.56x = 864.58 × 346.76
  4. Step 4: Simplify right side
    626.56x = 299,798.73
  5. Step 5: Solve for x
    x = 299,798.73/626.56
  6. Step 6: Final answer
    x = 478.48

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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.