Home / 919,978.85-1,269,542.55-512,070.20

Finding the Fourth Proportional to 919,978.85, 1,269,542.55 and 512,070.20

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Solution

The fourth proportional to 919,978.85, 1,269,542.55 and 512,070.20 is: 706,641.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,978.85 : 1,269,542.55 = 512,070.20 : x
  2. Step 2: Convert to fraction form
    919,978.85/1,269,542.55 = 512,070.20/x
  3. Step 3: Cross multiply
    919,978.85x = 1,269,542.55 × 512,070.20
  4. Step 4: Simplify right side
    919,978.85x = 650,094,907,820.35
  5. Step 5: Solve for x
    x = 650,094,907,820.35/919,978.85
  6. Step 6: Final answer
    x = 706,641.14

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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.