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Finding the Fourth Proportional to 665,657.40, 998,486.10 and 665,657.40

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Solution

The fourth proportional to 665,657.40, 998,486.10 and 665,657.40 is: 998,486.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,657.40 : 998,486.10 = 665,657.40 : x
  2. Step 2: Convert to fraction form
    665,657.40/998,486.10 = 665,657.40/x
  3. Step 3: Cross multiply
    665,657.40x = 998,486.10 × 665,657.40
  4. Step 4: Simplify right side
    665,657.40x = 664,649,661,262.14
  5. Step 5: Solve for x
    x = 664,649,661,262.14/665,657.40
  6. Step 6: Final answer
    x = 998,486.10

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Double scale
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Similar ratio
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1.5x scale

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.