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Finding the Fourth Proportional to 978,840.45, 1,350,809.04 and 549,129.80

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Solution

The fourth proportional to 978,840.45, 1,350,809.04 and 549,129.80 is: 757,804.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,840.45 : 1,350,809.04 = 549,129.80 : x
  2. Step 2: Convert to fraction form
    978,840.45/1,350,809.04 = 549,129.80/x
  3. Step 3: Cross multiply
    978,840.45x = 1,350,809.04 × 549,129.80
  4. Step 4: Simplify right side
    978,840.45x = 741,769,495,227.74
  5. Step 5: Solve for x
    x = 741,769,495,227.74/978,840.45
  6. Step 6: Final answer
    x = 757,804.29

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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.