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Finding the Fourth Proportional to 910,288.80, 1,364,266.80 and 809,978.40

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Solution

The fourth proportional to 910,288.80, 1,364,266.80 and 809,978.40 is: 1,213,929.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    910,288.80 : 1,364,266.80 = 809,978.40 : x
  2. Step 2: Convert to fraction form
    910,288.80/1,364,266.80 = 809,978.40/x
  3. Step 3: Cross multiply
    910,288.80x = 1,364,266.80 × 809,978.40
  4. Step 4: Simplify right side
    910,288.80x = 1,105,026,639,837.12
  5. Step 5: Solve for x
    x = 1,105,026,639,837.12/910,288.80
  6. Step 6: Final answer
    x = 1,213,929.73

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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.