Home / 686,668,918.38-947,628,026.91-393,370,173.42

Finding the Fourth Proportional to 686,668,918.38, 947,628,026.91 and 393,370,173.42

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Solution

The fourth proportional to 686,668,918.38, 947,628,026.91 and 393,370,173.42 is: 542,865,114.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,668,918.38 : 947,628,026.91 = 393,370,173.42 : x
  2. Step 2: Convert to fraction form
    686,668,918.38/947,628,026.91 = 393,370,173.42/x
  3. Step 3: Cross multiply
    686,668,918.38x = 947,628,026.91 × 393,370,173.42
  4. Step 4: Simplify right side
    686,668,918.38x = 372,768,601,283,239,104
  5. Step 5: Solve for x
    x = 372,768,601,283,239,104/686,668,918.38
  6. Step 6: Final answer
    x = 542,865,114.91

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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.