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Finding the Fourth Proportional to 715,627.24, 987,573.24 and 388,940.24

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Solution

The fourth proportional to 715,627.24, 987,573.24 and 388,940.24 is: 536,741.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,627.24 : 987,573.24 = 388,940.24 : x
  2. Step 2: Convert to fraction form
    715,627.24/987,573.24 = 388,940.24/x
  3. Step 3: Cross multiply
    715,627.24x = 987,573.24 × 388,940.24
  4. Step 4: Simplify right side
    715,627.24x = 384,106,972,983.18
  5. Step 5: Solve for x
    x = 384,106,972,983.18/715,627.24
  6. Step 6: Final answer
    x = 536,741.69

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1.5x scale

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.