Home / 1,123,420.38-1,550,330.44-639,978.36

Finding the Fourth Proportional to 1,123,420.38, 1,550,330.44 and 639,978.36

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Solution

The fourth proportional to 1,123,420.38, 1,550,330.44 and 639,978.36 is: 883,176.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123,420.38 : 1,550,330.44 = 639,978.36 : x
  2. Step 2: Convert to fraction form
    1,123,420.38/1,550,330.44 = 639,978.36/x
  3. Step 3: Cross multiply
    1,123,420.38x = 1,550,330.44 × 639,978.36
  4. Step 4: Simplify right side
    1,123,420.38x = 992,177,932,449.28
  5. Step 5: Solve for x
    x = 992,177,932,449.28/1,123,420.38
  6. Step 6: Final answer
    x = 883,176.01

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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.