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Finding the Fourth Proportional to 999,728.60, 1,497,260.10 and 979,683.80

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Solution

The fourth proportional to 999,728.60, 1,497,260.10 and 979,683.80 is: 1,467,239.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,728.60 : 1,497,260.10 = 979,683.80 : x
  2. Step 2: Convert to fraction form
    999,728.60/1,497,260.10 = 979,683.80/x
  3. Step 3: Cross multiply
    999,728.60x = 1,497,260.10 × 979,683.80
  4. Step 4: Simplify right side
    999,728.60x = 1,466,841,464,356.38
  5. Step 5: Solve for x
    x = 1,466,841,464,356.38/999,728.60
  6. Step 6: Final answer
    x = 1,467,239.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.