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Finding the Fourth Proportional to 830.75, 1,146.71 and 481.37

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Solution

The fourth proportional to 830.75, 1,146.71 and 481.37 is: 664.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.75 : 1,146.71 = 481.37 : x
  2. Step 2: Convert to fraction form
    830.75/1,146.71 = 481.37/x
  3. Step 3: Cross multiply
    830.75x = 1,146.71 × 481.37
  4. Step 4: Simplify right side
    830.75x = 551,989.39
  5. Step 5: Solve for x
    x = 551,989.39/830.75
  6. Step 6: Final answer
    x = 664.45

Related Problems

Find fourth proportional to 415.38, 573.35 and 240.69
Half scale
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Double scale
Find fourth proportional to 831.75, 1,148.09 and 482.37
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.