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Finding the Fourth Proportional to 665,640.80, 998,461.20 and 245,080.70

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Solution

The fourth proportional to 665,640.80, 998,461.20 and 245,080.70 is: 367,621.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,640.80 : 998,461.20 = 245,080.70 : x
  2. Step 2: Convert to fraction form
    665,640.80/998,461.20 = 245,080.70/x
  3. Step 3: Cross multiply
    665,640.80x = 998,461.20 × 245,080.70
  4. Step 4: Simplify right side
    665,640.80x = 244,703,569,818.84
  5. Step 5: Solve for x
    x = 244,703,569,818.84/665,640.80
  6. Step 6: Final answer
    x = 367,621.05

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Double scale
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Similar ratio
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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.