Home / 1,383,789.28-1,909,585.88-811,210.80

Finding the Fourth Proportional to 1,383,789.28, 1,909,585.88 and 811,210.80

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Solution

The fourth proportional to 1,383,789.28, 1,909,585.88 and 811,210.80 is: 1,119,445.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,789.28 : 1,909,585.88 = 811,210.80 : x
  2. Step 2: Convert to fraction form
    1,383,789.28/1,909,585.88 = 811,210.80/x
  3. Step 3: Cross multiply
    1,383,789.28x = 1,909,585.88 × 811,210.80
  4. Step 4: Simplify right side
    1,383,789.28x = 1,549,076,689,383.50
  5. Step 5: Solve for x
    x = 1,549,076,689,383.50/1,383,789.28
  6. Step 6: Final answer
    x = 1,119,445.51

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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.