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Finding the Fourth Proportional to 830.42, 1,245.21 and 483.83

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Solution

The fourth proportional to 830.42, 1,245.21 and 483.83 is: 725.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.42 : 1,245.21 = 483.83 : x
  2. Step 2: Convert to fraction form
    830.42/1,245.21 = 483.83/x
  3. Step 3: Cross multiply
    830.42x = 1,245.21 × 483.83
  4. Step 4: Simplify right side
    830.42x = 602,463.73
  5. Step 5: Solve for x
    x = 602,463.73/830.42
  6. Step 6: Final answer
    x = 725.50

Related Problems

Find fourth proportional to 415.21, 622.61 and 241.91
Half scale
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Double scale
Find fourth proportional to 831.42, 1,246.71 and 484.83
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.