Home / 715,955.34-988,022.07-393,686.31

Finding the Fourth Proportional to 715,955.34, 988,022.07 and 393,686.31

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Solution

The fourth proportional to 715,955.34, 988,022.07 and 393,686.31 is: 543,289.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,955.34 : 988,022.07 = 393,686.31 : x
  2. Step 2: Convert to fraction form
    715,955.34/988,022.07 = 393,686.31/x
  3. Step 3: Cross multiply
    715,955.34x = 988,022.07 × 393,686.31
  4. Step 4: Simplify right side
    715,955.34x = 388,970,762,936.86
  5. Step 5: Solve for x
    x = 388,970,762,936.86/715,955.34
  6. Step 6: Final answer
    x = 543,289.14

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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.