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Finding the Fourth Proportional to 686,668,755.42, 947,627,800.92 and 393,370,010.46

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Solution

The fourth proportional to 686,668,755.42, 947,627,800.92 and 393,370,010.46 is: 542,864,889.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,668,755.42 : 947,627,800.92 = 393,370,010.46 : x
  2. Step 2: Convert to fraction form
    686,668,755.42/947,627,800.92 = 393,370,010.46/x
  3. Step 3: Cross multiply
    686,668,755.42x = 947,627,800.92 × 393,370,010.46
  4. Step 4: Simplify right side
    686,668,755.42x = 372,768,357,960,087,168
  5. Step 5: Solve for x
    x = 372,768,357,960,087,168/686,668,755.42
  6. Step 6: Final answer
    x = 542,864,889.39

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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.