Home / 811,167.20-1,216,779.05-278,684.34

Finding the Fourth Proportional to 811,167.20, 1,216,779.05 and 278,684.34

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Solution

The fourth proportional to 811,167.20, 1,216,779.05 and 278,684.34 is: 418,036.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,167.20 : 1,216,779.05 = 278,684.34 : x
  2. Step 2: Convert to fraction form
    811,167.20/1,216,779.05 = 278,684.34/x
  3. Step 3: Cross multiply
    811,167.20x = 1,216,779.05 × 278,684.34
  4. Step 4: Simplify right side
    811,167.20x = 339,097,258,997.76
  5. Step 5: Solve for x
    x = 339,097,258,997.76/811,167.20
  6. Step 6: Final answer
    x = 418,036.21

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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.