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Finding the Fourth Proportional to 978,840.79, 1,350,809.51 and 549,130.15

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Solution

The fourth proportional to 978,840.79, 1,350,809.51 and 549,130.15 is: 757,804.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,840.79 : 1,350,809.51 = 549,130.15 : x
  2. Step 2: Convert to fraction form
    978,840.79/1,350,809.51 = 549,130.15/x
  3. Step 3: Cross multiply
    978,840.79x = 1,350,809.51 × 549,130.15
  4. Step 4: Simplify right side
    978,840.79x = 741,770,230,879.45
  5. Step 5: Solve for x
    x = 741,770,230,879.45/978,840.79
  6. Step 6: Final answer
    x = 757,804.78

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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.