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Finding the Fourth Proportional to 551.96, 761.14 and 386.12

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Solution

The fourth proportional to 551.96, 761.14 and 386.12 is: 532.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.96 : 761.14 = 386.12 : x
  2. Step 2: Convert to fraction form
    551.96/761.14 = 386.12/x
  3. Step 3: Cross multiply
    551.96x = 761.14 × 386.12
  4. Step 4: Simplify right side
    551.96x = 293,891.38
  5. Step 5: Solve for x
    x = 293,891.38/551.96
  6. Step 6: Final answer
    x = 532.45

Related Problems

Find fourth proportional to 275.98, 380.57 and 193.06
Half scale
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Double scale
Find fourth proportional to 552.96, 762.52 and 387.12
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.