Home / 828,080.90-1,240,128.10-561,031.79

Finding the Fourth Proportional to 828,080.90, 1,240,128.10 and 561,031.79

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Solution

The fourth proportional to 828,080.90, 1,240,128.10 and 561,031.79 is: 840,197.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,080.90 : 1,240,128.10 = 561,031.79 : x
  2. Step 2: Convert to fraction form
    828,080.90/1,240,128.10 = 561,031.79/x
  3. Step 3: Cross multiply
    828,080.90x = 1,240,128.10 × 561,031.79
  4. Step 4: Simplify right side
    828,080.90x = 695,751,291,158.63
  5. Step 5: Solve for x
    x = 695,751,291,158.63/828,080.90
  6. Step 6: Final answer
    x = 840,197.25

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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.