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Finding the Fourth Proportional to 621,369,942.66, 857,488,762.62 and 342,909,475.11

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Solution

The fourth proportional to 621,369,942.66, 857,488,762.62 and 342,909,475.11 is: 473,214,105.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,369,942.66 : 857,488,762.62 = 342,909,475.11 : x
  2. Step 2: Convert to fraction form
    621,369,942.66/857,488,762.62 = 342,909,475.11/x
  3. Step 3: Cross multiply
    621,369,942.66x = 857,488,762.62 × 342,909,475.11
  4. Step 4: Simplify right side
    621,369,942.66x = 294,041,021,502,747,584
  5. Step 5: Solve for x
    x = 294,041,021,502,747,584/621,369,942.66
  6. Step 6: Final answer
    x = 473,214,105.34

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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.