Home / 861,059,769.30-1,188,629,782.74-578,965,719.60

Finding the Fourth Proportional to 861,059,769.30, 1,188,629,782.74 and 578,965,719.60

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Solution

The fourth proportional to 861,059,769.30, 1,188,629,782.74 and 578,965,719.60 is: 799,219,661.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,059,769.30 : 1,188,629,782.74 = 578,965,719.60 : x
  2. Step 2: Convert to fraction form
    861,059,769.30/1,188,629,782.74 = 578,965,719.60/x
  3. Step 3: Cross multiply
    861,059,769.30x = 1,188,629,782.74 × 578,965,719.60
  4. Step 4: Simplify right side
    861,059,769.30x = 688,175,897,502,055,808
  5. Step 5: Solve for x
    x = 688,175,897,502,055,808/861,059,769.30
  6. Step 6: Final answer
    x = 799,219,661.68

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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.