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Finding the Fourth Proportional to 857,866.40, 1,286,808.90 and 258,832.88

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Solution

The fourth proportional to 857,866.40, 1,286,808.90 and 258,832.88 is: 388,252.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,866.40 : 1,286,808.90 = 258,832.88 : x
  2. Step 2: Convert to fraction form
    857,866.40/1,286,808.90 = 258,832.88/x
  3. Step 3: Cross multiply
    857,866.40x = 1,286,808.90 × 258,832.88
  4. Step 4: Simplify right side
    857,866.40x = 333,068,453,596.63
  5. Step 5: Solve for x
    x = 333,068,453,596.63/857,866.40
  6. Step 6: Final answer
    x = 388,252.13

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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.