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Finding the Fourth Proportional to 553.29, 763.54 and 304.62

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Solution

The fourth proportional to 553.29, 763.54 and 304.62 is: 420.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.29 : 763.54 = 304.62 : x
  2. Step 2: Convert to fraction form
    553.29/763.54 = 304.62/x
  3. Step 3: Cross multiply
    553.29x = 763.54 × 304.62
  4. Step 4: Simplify right side
    553.29x = 232,589.55
  5. Step 5: Solve for x
    x = 232,589.55/553.29
  6. Step 6: Final answer
    x = 420.38

Related Problems

Find fourth proportional to 276.65, 381.77 and 152.31
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Double scale
Find fourth proportional to 554.29, 764.92 and 305.62
Similar ratio
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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.