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Finding the Fourth Proportional to 978,841.20, 1,350,810.07 and 549,130.55

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Solution

The fourth proportional to 978,841.20, 1,350,810.07 and 549,130.55 is: 757,805.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,841.20 : 1,350,810.07 = 549,130.55 : x
  2. Step 2: Convert to fraction form
    978,841.20/1,350,810.07 = 549,130.55/x
  3. Step 3: Cross multiply
    978,841.20x = 1,350,810.07 × 549,130.55
  4. Step 4: Simplify right side
    978,841.20x = 741,771,076,684.64
  5. Step 5: Solve for x
    x = 741,771,076,684.64/978,841.20
  6. Step 6: Final answer
    x = 757,805.33

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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.