Home / 505,139.52-697,089.36-278,784.96

Finding the Fourth Proportional to 505,139.52, 697,089.36 and 278,784.96

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Solution

The fourth proportional to 505,139.52, 697,089.36 and 278,784.96 is: 384,721.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,139.52 : 697,089.36 = 278,784.96 : x
  2. Step 2: Convert to fraction form
    505,139.52/697,089.36 = 278,784.96/x
  3. Step 3: Cross multiply
    505,139.52x = 697,089.36 × 278,784.96
  4. Step 4: Simplify right side
    505,139.52x = 194,338,029,344.03
  5. Step 5: Solve for x
    x = 194,338,029,344.03/505,139.52
  6. Step 6: Final answer
    x = 384,721.49

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.