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Finding the Fourth Proportional to 485.46, 669.96 and 374.76

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Solution

The fourth proportional to 485.46, 669.96 and 374.76 is: 517.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.46 : 669.96 = 374.76 : x
  2. Step 2: Convert to fraction form
    485.46/669.96 = 374.76/x
  3. Step 3: Cross multiply
    485.46x = 669.96 × 374.76
  4. Step 4: Simplify right side
    485.46x = 251,074.21
  5. Step 5: Solve for x
    x = 251,074.21/485.46
  6. Step 6: Final answer
    x = 517.19

Related Problems

Find fourth proportional to 242.73, 334.98 and 187.38
Half scale
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Double scale
Find fourth proportional to 486.46, 671.34 and 375.76
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.