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Finding the Fourth Proportional to 857,710.80, 1,286,566.20 and 842,965.20

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Solution

The fourth proportional to 857,710.80, 1,286,566.20 and 842,965.20 is: 1,264,447.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,710.80 : 1,286,566.20 = 842,965.20 : x
  2. Step 2: Convert to fraction form
    857,710.80/1,286,566.20 = 842,965.20/x
  3. Step 3: Cross multiply
    857,710.80x = 1,286,566.20 × 842,965.20
  4. Step 4: Simplify right side
    857,710.80x = 1,084,530,534,096.24
  5. Step 5: Solve for x
    x = 1,084,530,534,096.24/857,710.80
  6. Step 6: Final answer
    x = 1,264,447.80

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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.