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Finding the Fourth Proportional to 720.62, 994.74 and 484.76

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Solution

The fourth proportional to 720.62, 994.74 and 484.76 is: 669.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.62 : 994.74 = 484.76 : x
  2. Step 2: Convert to fraction form
    720.62/994.74 = 484.76/x
  3. Step 3: Cross multiply
    720.62x = 994.74 × 484.76
  4. Step 4: Simplify right side
    720.62x = 482,210.16
  5. Step 5: Solve for x
    x = 482,210.16/720.62
  6. Step 6: Final answer
    x = 669.16

Related Problems

Find fourth proportional to 360.31, 497.37 and 242.38
Half scale
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Double scale
Find fourth proportional to 721.62, 996.12 and 485.76
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.