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Finding the Fourth Proportional to 647,307.18, 892,918.08 and 405,169.32

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Solution

The fourth proportional to 647,307.18, 892,918.08 and 405,169.32 is: 558,904.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,307.18 : 892,918.08 = 405,169.32 : x
  2. Step 2: Convert to fraction form
    647,307.18/892,918.08 = 405,169.32/x
  3. Step 3: Cross multiply
    647,307.18x = 892,918.08 × 405,169.32
  4. Step 4: Simplify right side
    647,307.18x = 361,783,011,289.31
  5. Step 5: Solve for x
    x = 361,783,011,289.31/647,307.18
  6. Step 6: Final answer
    x = 558,904.68

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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.