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Finding the Fourth Proportional to 861,855.36, 1,292,978.88 and 262,870.08

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Solution

The fourth proportional to 861,855.36, 1,292,978.88 and 262,870.08 is: 394,364.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,855.36 : 1,292,978.88 = 262,870.08 : x
  2. Step 2: Convert to fraction form
    861,855.36/1,292,978.88 = 262,870.08/x
  3. Step 3: Cross multiply
    861,855.36x = 1,292,978.88 × 262,870.08
  4. Step 4: Simplify right side
    861,855.36x = 339,885,461,623.91
  5. Step 5: Solve for x
    x = 339,885,461,623.91/861,855.36
  6. Step 6: Final answer
    x = 394,364.85

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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.