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Finding the Fourth Proportional to 660,343.40, 990,515.10 and 161,707.40

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Solution

The fourth proportional to 660,343.40, 990,515.10 and 161,707.40 is: 242,561.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,343.40 : 990,515.10 = 161,707.40 : x
  2. Step 2: Convert to fraction form
    660,343.40/990,515.10 = 161,707.40/x
  3. Step 3: Cross multiply
    660,343.40x = 990,515.10 × 161,707.40
  4. Step 4: Simplify right side
    660,343.40x = 160,173,621,481.74
  5. Step 5: Solve for x
    x = 160,173,621,481.74/660,343.40
  6. Step 6: Final answer
    x = 242,561.10

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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.