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Finding the Fourth Proportional to 720,194, 993,867.72 and 402,242

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Solution

The fourth proportional to 720,194, 993,867.72 and 402,242 is: 555,093.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,194 : 993,867.72 = 402,242 : x
  2. Step 2: Convert to fraction form
    720,194/993,867.72 = 402,242/x
  3. Step 3: Cross multiply
    720,194x = 993,867.72 × 402,242
  4. Step 4: Simplify right side
    720,194x = 399,775,339,428.24
  5. Step 5: Solve for x
    x = 399,775,339,428.24/720,194
  6. Step 6: Final answer
    x = 555,093.96

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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.