Home / 715,835.85-987,844.60-393,543.12

Finding the Fourth Proportional to 715,835.85, 987,844.60 and 393,543.12

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Solution

The fourth proportional to 715,835.85, 987,844.60 and 393,543.12 is: 543,084.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,835.85 : 987,844.60 = 393,543.12 : x
  2. Step 2: Convert to fraction form
    715,835.85/987,844.60 = 393,543.12/x
  3. Step 3: Cross multiply
    715,835.85x = 987,844.60 × 393,543.12
  4. Step 4: Simplify right side
    715,835.85x = 388,759,445,959.15
  5. Step 5: Solve for x
    x = 388,759,445,959.15/715,835.85
  6. Step 6: Final answer
    x = 543,084.63

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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.