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Finding the Fourth Proportional to 978,847.10, 1,350,818.20 and 549,136.44

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Solution

The fourth proportional to 978,847.10, 1,350,818.20 and 549,136.44 is: 757,813.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,847.10 : 1,350,818.20 = 549,136.44 : x
  2. Step 2: Convert to fraction form
    978,847.10/1,350,818.20 = 549,136.44/x
  3. Step 3: Cross multiply
    978,847.10x = 1,350,818.20 × 549,136.44
  4. Step 4: Simplify right side
    978,847.10x = 741,783,497,435.21
  5. Step 5: Solve for x
    x = 741,783,497,435.21/978,847.10
  6. Step 6: Final answer
    x = 757,813.45

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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.