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Finding the Fourth Proportional to 631,889.40, 945,990.90 and 613,457.40

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Solution

The fourth proportional to 631,889.40, 945,990.90 and 613,457.40 is: 918,396.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,889.40 : 945,990.90 = 613,457.40 : x
  2. Step 2: Convert to fraction form
    631,889.40/945,990.90 = 613,457.40/x
  3. Step 3: Cross multiply
    631,889.40x = 945,990.90 × 613,457.40
  4. Step 4: Simplify right side
    631,889.40x = 580,325,117,937.66
  5. Step 5: Solve for x
    x = 580,325,117,937.66/631,889.40
  6. Step 6: Final answer
    x = 918,396.67

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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.