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Finding the Fourth Proportional to 999,969.82, 1,379,924.30 and 570,389.02

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Solution

The fourth proportional to 999,969.82, 1,379,924.30 and 570,389.02 is: 787,117.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,969.82 : 1,379,924.30 = 570,389.02 : x
  2. Step 2: Convert to fraction form
    999,969.82/1,379,924.30 = 570,389.02/x
  3. Step 3: Cross multiply
    999,969.82x = 1,379,924.30 × 570,389.02
  4. Step 4: Simplify right side
    999,969.82x = 787,093,669,151.19
  5. Step 5: Solve for x
    x = 787,093,669,151.19/999,969.82
  6. Step 6: Final answer
    x = 787,117.42

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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.