Home / 715,849.84-987,876.18-393,580.80

Finding the Fourth Proportional to 715,849.84, 987,876.18 and 393,580.80

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Solution

The fourth proportional to 715,849.84, 987,876.18 and 393,580.80 is: 543,143.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,849.84 : 987,876.18 = 393,580.80 : x
  2. Step 2: Convert to fraction form
    715,849.84/987,876.18 = 393,580.80/x
  3. Step 3: Cross multiply
    715,849.84x = 987,876.18 × 393,580.80
  4. Step 4: Simplify right side
    715,849.84x = 388,809,097,225.34
  5. Step 5: Solve for x
    x = 388,809,097,225.34/715,849.84
  6. Step 6: Final answer
    x = 543,143.37

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Double scale
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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.