Home / 919,985.58-1,269,580.23-512,078.76

Finding the Fourth Proportional to 919,985.58, 1,269,580.23 and 512,078.76

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Solution

The fourth proportional to 919,985.58, 1,269,580.23 and 512,078.76 is: 706,668.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,985.58 : 1,269,580.23 = 512,078.76 : x
  2. Step 2: Convert to fraction form
    919,985.58/1,269,580.23 = 512,078.76/x
  3. Step 3: Cross multiply
    919,985.58x = 1,269,580.23 × 512,078.76
  4. Step 4: Simplify right side
    919,985.58x = 650,125,069,898.92
  5. Step 5: Solve for x
    x = 650,125,069,898.92/919,985.58
  6. Step 6: Final answer
    x = 706,668.76

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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.