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Finding the Fourth Proportional to 830.33, 1,245.36 and 275.03

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Solution

The fourth proportional to 830.33, 1,245.36 and 275.03 is: 412.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.33 : 1,245.36 = 275.03 : x
  2. Step 2: Convert to fraction form
    830.33/1,245.36 = 275.03/x
  3. Step 3: Cross multiply
    830.33x = 1,245.36 × 275.03
  4. Step 4: Simplify right side
    830.33x = 342,509.99
  5. Step 5: Solve for x
    x = 342,509.99/830.33
  6. Step 6: Final answer
    x = 412.50

Related Problems

Find fourth proportional to 415.17, 622.68 and 137.52
Half scale
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Double scale
Find fourth proportional to 831.33, 1,246.85 and 276.03
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.