Home / 805,640.20-1,208,460.30-540,219.40

Finding the Fourth Proportional to 805,640.20, 1,208,460.30 and 540,219.40

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Solution

The fourth proportional to 805,640.20, 1,208,460.30 and 540,219.40 is: 810,329.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,640.20 : 1,208,460.30 = 540,219.40 : x
  2. Step 2: Convert to fraction form
    805,640.20/1,208,460.30 = 540,219.40/x
  3. Step 3: Cross multiply
    805,640.20x = 1,208,460.30 × 540,219.40
  4. Step 4: Simplify right side
    805,640.20x = 652,833,698,189.82
  5. Step 5: Solve for x
    x = 652,833,698,189.82/805,640.20
  6. Step 6: Final answer
    x = 810,329.10

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.