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Finding the Fourth Proportional to 978,840.20, 1,350,808.69 and 549,129.55

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Solution

The fourth proportional to 978,840.20, 1,350,808.69 and 549,129.55 is: 757,803.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,840.20 : 1,350,808.69 = 549,129.55 : x
  2. Step 2: Convert to fraction form
    978,840.20/1,350,808.69 = 549,129.55/x
  3. Step 3: Cross multiply
    978,840.20x = 1,350,808.69 × 549,129.55
  4. Step 4: Simplify right side
    978,840.20x = 741,768,966,888.33
  5. Step 5: Solve for x
    x = 741,768,966,888.33/978,840.20
  6. Step 6: Final answer
    x = 757,803.95

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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.