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Finding the Fourth Proportional to 715,998.66, 988,051.59 and 393,689.58

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Solution

The fourth proportional to 715,998.66, 988,051.59 and 393,689.58 is: 543,277.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,998.66 : 988,051.59 = 393,689.58 : x
  2. Step 2: Convert to fraction form
    715,998.66/988,051.59 = 393,689.58/x
  3. Step 3: Cross multiply
    715,998.66x = 988,051.59 × 393,689.58
  4. Step 4: Simplify right side
    715,998.66x = 388,985,615,485.43
  5. Step 5: Solve for x
    x = 388,985,615,485.43/715,998.66
  6. Step 6: Final answer
    x = 543,277.02

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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.