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Finding the Fourth Proportional to 978,840.70, 1,350,809.38 and 549,130.05

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Solution

The fourth proportional to 978,840.70, 1,350,809.38 and 549,130.05 is: 757,804.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,840.70 : 1,350,809.38 = 549,130.05 : x
  2. Step 2: Convert to fraction form
    978,840.70/1,350,809.38 = 549,130.05/x
  3. Step 3: Cross multiply
    978,840.70x = 1,350,809.38 × 549,130.05
  4. Step 4: Simplify right side
    978,840.70x = 741,770,022,379.87
  5. Step 5: Solve for x
    x = 741,770,022,379.87/978,840.70
  6. Step 6: Final answer
    x = 757,804.64

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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.