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Finding the Fourth Proportional to 999,310.02, 1,378,660.47 and 636,668.94

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Solution

The fourth proportional to 999,310.02, 1,378,660.47 and 636,668.94 is: 878,356.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,310.02 : 1,378,660.47 = 636,668.94 : x
  2. Step 2: Convert to fraction form
    999,310.02/1,378,660.47 = 636,668.94/x
  3. Step 3: Cross multiply
    999,310.02x = 1,378,660.47 × 636,668.94
  4. Step 4: Simplify right side
    999,310.02x = 877,750,300,054.80
  5. Step 5: Solve for x
    x = 877,750,300,054.80/999,310.02
  6. Step 6: Final answer
    x = 878,356.35

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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.