Home / 686,668,814.88-947,627,883.60-393,370,069.92

Finding the Fourth Proportional to 686,668,814.88, 947,627,883.60 and 393,370,069.92

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Solution

The fourth proportional to 686,668,814.88, 947,627,883.60 and 393,370,069.92 is: 542,864,971.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,668,814.88 : 947,627,883.60 = 393,370,069.92 : x
  2. Step 2: Convert to fraction form
    686,668,814.88/947,627,883.60 = 393,370,069.92/x
  3. Step 3: Cross multiply
    686,668,814.88x = 947,627,883.60 × 393,370,069.92
  4. Step 4: Simplify right side
    686,668,814.88x = 372,768,446,829,873,664
  5. Step 5: Solve for x
    x = 372,768,446,829,873,664/686,668,814.88
  6. Step 6: Final answer
    x = 542,864,971.81

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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.