Home / 876,189.78-1,209,178.53-553,782.78

Finding the Fourth Proportional to 876,189.78, 1,209,178.53 and 553,782.78

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Solution

The fourth proportional to 876,189.78, 1,209,178.53 and 553,782.78 is: 764,243.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,189.78 : 1,209,178.53 = 553,782.78 : x
  2. Step 2: Convert to fraction form
    876,189.78/1,209,178.53 = 553,782.78/x
  3. Step 3: Cross multiply
    876,189.78x = 1,209,178.53 × 553,782.78
  4. Step 4: Simplify right side
    876,189.78x = 669,622,247,859.71
  5. Step 5: Solve for x
    x = 669,622,247,859.71/876,189.78
  6. Step 6: Final answer
    x = 764,243.39

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Half scale
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Double scale
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Similar ratio
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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.