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Finding the Fourth Proportional to 450.75, 621.84 and 291.16

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Solution

The fourth proportional to 450.75, 621.84 and 291.16 is: 401.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.75 : 621.84 = 291.16 : x
  2. Step 2: Convert to fraction form
    450.75/621.84 = 291.16/x
  3. Step 3: Cross multiply
    450.75x = 621.84 × 291.16
  4. Step 4: Simplify right side
    450.75x = 181,054.93
  5. Step 5: Solve for x
    x = 181,054.93/450.75
  6. Step 6: Final answer
    x = 401.67

Related Problems

Find fourth proportional to 225.38, 310.92 and 145.58
Half scale
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Double scale
Find fourth proportional to 451.75, 623.22 and 292.16
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.