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Finding the Fourth Proportional to 715,998.88, 988,094.48 and 393,688.48

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Solution

The fourth proportional to 715,998.88, 988,094.48 and 393,688.48 is: 543,298.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,998.88 : 988,094.48 = 393,688.48 : x
  2. Step 2: Convert to fraction form
    715,998.88/988,094.48 = 393,688.48/x
  3. Step 3: Cross multiply
    715,998.88x = 988,094.48 × 393,688.48
  4. Step 4: Simplify right side
    715,998.88x = 389,001,413,927.59
  5. Step 5: Solve for x
    x = 389,001,413,927.59/715,998.88
  6. Step 6: Final answer
    x = 543,298.91

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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.