Home / 720,805.20-1,081,985.40-405,877.20

Finding the Fourth Proportional to 720,805.20, 1,081,985.40 and 405,877.20

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Solution

The fourth proportional to 720,805.20, 1,081,985.40 and 405,877.20 is: 609,253.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,805.20 : 1,081,985.40 = 405,877.20 : x
  2. Step 2: Convert to fraction form
    720,805.20/1,081,985.40 = 405,877.20/x
  3. Step 3: Cross multiply
    720,805.20x = 1,081,985.40 × 405,877.20
  4. Step 4: Simplify right side
    720,805.20x = 439,153,204,592.88
  5. Step 5: Solve for x
    x = 439,153,204,592.88/720,805.20
  6. Step 6: Final answer
    x = 609,253.66

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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.