Home / 715,278.74-987,068.79-388,583.31

Finding the Fourth Proportional to 715,278.74, 987,068.79 and 388,583.31

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Solution

The fourth proportional to 715,278.74, 987,068.79 and 388,583.31 is: 536,236.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,278.74 : 987,068.79 = 388,583.31 : x
  2. Step 2: Convert to fraction form
    715,278.74/987,068.79 = 388,583.31/x
  3. Step 3: Cross multiply
    715,278.74x = 987,068.79 × 388,583.31
  4. Step 4: Simplify right side
    715,278.74x = 383,558,460,202.57
  5. Step 5: Solve for x
    x = 383,558,460,202.57/715,278.74
  6. Step 6: Final answer
    x = 536,236.35

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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.