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Finding the Fourth Proportional to 857,840.80, 1,286,530.80 and 359,101.60

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Solution

The fourth proportional to 857,840.80, 1,286,530.80 and 359,101.60 is: 538,555.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,840.80 : 1,286,530.80 = 359,101.60 : x
  2. Step 2: Convert to fraction form
    857,840.80/1,286,530.80 = 359,101.60/x
  3. Step 3: Cross multiply
    857,840.80x = 1,286,530.80 × 359,101.60
  4. Step 4: Simplify right side
    857,840.80x = 461,995,268,729.28
  5. Step 5: Solve for x
    x = 461,995,268,729.28/857,840.80
  6. Step 6: Final answer
    x = 538,555.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.