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Finding the Fourth Proportional to 484.92, 669.02 and 319.22

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Solution

The fourth proportional to 484.92, 669.02 and 319.22 is: 440.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.92 : 669.02 = 319.22 : x
  2. Step 2: Convert to fraction form
    484.92/669.02 = 319.22/x
  3. Step 3: Cross multiply
    484.92x = 669.02 × 319.22
  4. Step 4: Simplify right side
    484.92x = 213,559.62
  5. Step 5: Solve for x
    x = 213,559.62/484.92
  6. Step 6: Final answer
    x = 440.40

Related Problems

Find fourth proportional to 242.46, 334.51 and 159.61
Half scale
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Double scale
Find fourth proportional to 485.92, 670.39 and 320.22
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.