Home / 648,142.20-972,213.30-543,166.20

Finding the Fourth Proportional to 648,142.20, 972,213.30 and 543,166.20

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Solution

The fourth proportional to 648,142.20, 972,213.30 and 543,166.20 is: 814,749.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,142.20 : 972,213.30 = 543,166.20 : x
  2. Step 2: Convert to fraction form
    648,142.20/972,213.30 = 543,166.20/x
  3. Step 3: Cross multiply
    648,142.20x = 972,213.30 × 543,166.20
  4. Step 4: Simplify right side
    648,142.20x = 528,073,403,750.46
  5. Step 5: Solve for x
    x = 528,073,403,750.46/648,142.20
  6. Step 6: Final answer
    x = 814,749.30

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Half scale
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Double scale
Find fourth proportional to 648,143.20, 972,214.80 and 543,167.20
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.