Home / 808,760.40-1,213,918.20-409,851.60

Finding the Fourth Proportional to 808,760.40, 1,213,918.20 and 409,851.60

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Solution

The fourth proportional to 808,760.40, 1,213,918.20 and 409,851.60 is: 615,171.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,760.40 : 1,213,918.20 = 409,851.60 : x
  2. Step 2: Convert to fraction form
    808,760.40/1,213,918.20 = 409,851.60/x
  3. Step 3: Cross multiply
    808,760.40x = 1,213,918.20 × 409,851.60
  4. Step 4: Simplify right side
    808,760.40x = 497,526,316,539.12
  5. Step 5: Solve for x
    x = 497,526,316,539.12/808,760.40
  6. Step 6: Final answer
    x = 615,171.46

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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.