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Finding the Fourth Proportional to 620.56, 856.52 and 384.36

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Solution

The fourth proportional to 620.56, 856.52 and 384.36 is: 530.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.56 : 856.52 = 384.36 : x
  2. Step 2: Convert to fraction form
    620.56/856.52 = 384.36/x
  3. Step 3: Cross multiply
    620.56x = 856.52 × 384.36
  4. Step 4: Simplify right side
    620.56x = 329,210.47
  5. Step 5: Solve for x
    x = 329,210.47/620.56
  6. Step 6: Final answer
    x = 530.51

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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.