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Finding the Fourth Proportional to 375,909,651.63, 518,747,501.66 and 208,636,099.56

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Solution

The fourth proportional to 375,909,651.63, 518,747,501.66 and 208,636,099.56 is: 287,913,478.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,909,651.63 : 518,747,501.66 = 208,636,099.56 : x
  2. Step 2: Convert to fraction form
    375,909,651.63/518,747,501.66 = 208,636,099.56/x
  3. Step 3: Cross multiply
    375,909,651.63x = 518,747,501.66 × 208,636,099.56
  4. Step 4: Simplify right side
    375,909,651.63x = 108,229,455,401,793,840
  5. Step 5: Solve for x
    x = 108,229,455,401,793,840/375,909,651.63
  6. Step 6: Final answer
    x = 287,913,478.50

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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.