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Finding the Fourth Proportional to 831.05, 1,146 and 551.19

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Solution

The fourth proportional to 831.05, 1,146 and 551.19 is: 760.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.05 : 1,146 = 551.19 : x
  2. Step 2: Convert to fraction form
    831.05/1,146 = 551.19/x
  3. Step 3: Cross multiply
    831.05x = 1,146 × 551.19
  4. Step 4: Simplify right side
    831.05x = 631,663.74
  5. Step 5: Solve for x
    x = 631,663.74/831.05
  6. Step 6: Final answer
    x = 760.08

Related Problems

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Half scale
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Double scale
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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.