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Finding the Fourth Proportional to 718,163.78, 990,751.86 and 472,832.06

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Solution

The fourth proportional to 718,163.78, 990,751.86 and 472,832.06 is: 652,301.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,163.78 : 990,751.86 = 472,832.06 : x
  2. Step 2: Convert to fraction form
    718,163.78/990,751.86 = 472,832.06/x
  3. Step 3: Cross multiply
    718,163.78x = 990,751.86 × 472,832.06
  4. Step 4: Simplify right side
    718,163.78x = 468,459,237,958.87
  5. Step 5: Solve for x
    x = 468,459,237,958.87/718,163.78
  6. Step 6: Final answer
    x = 652,301.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.