Home / 728,420.70-1,092,112.65-278,967.90

Finding the Fourth Proportional to 728,420.70, 1,092,112.65 and 278,967.90

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Solution

The fourth proportional to 728,420.70, 1,092,112.65 and 278,967.90 is: 418,253.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,420.70 : 1,092,112.65 = 278,967.90 : x
  2. Step 2: Convert to fraction form
    728,420.70/1,092,112.65 = 278,967.90/x
  3. Step 3: Cross multiply
    728,420.70x = 1,092,112.65 × 278,967.90
  4. Step 4: Simplify right side
    728,420.70x = 304,664,372,533.94
  5. Step 5: Solve for x
    x = 304,664,372,533.94/728,420.70
  6. Step 6: Final answer
    x = 418,253.32

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1.5x scale

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.