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Finding the Fourth Proportional to 621,812.40, 931,163.40 and 497,396.40

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Solution

The fourth proportional to 621,812.40, 931,163.40 and 497,396.40 is: 744,850.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,812.40 : 931,163.40 = 497,396.40 : x
  2. Step 2: Convert to fraction form
    621,812.40/931,163.40 = 497,396.40/x
  3. Step 3: Cross multiply
    621,812.40x = 931,163.40 × 497,396.40
  4. Step 4: Simplify right side
    621,812.40x = 463,157,322,971.76
  5. Step 5: Solve for x
    x = 463,157,322,971.76/621,812.40
  6. Step 6: Final answer
    x = 744,850.57

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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.