Home / 1,128,078.02-1,691,275.48-678,693.60

Finding the Fourth Proportional to 1,128,078.02, 1,691,275.48 and 678,693.60

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Solution

The fourth proportional to 1,128,078.02, 1,691,275.48 and 678,693.60 is: 1,017,534.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128,078.02 : 1,691,275.48 = 678,693.60 : x
  2. Step 2: Convert to fraction form
    1,128,078.02/1,691,275.48 = 678,693.60/x
  3. Step 3: Cross multiply
    1,128,078.02x = 1,691,275.48 × 678,693.60
  4. Step 4: Simplify right side
    1,128,078.02x = 1,147,857,842,416.19
  5. Step 5: Solve for x
    x = 1,147,857,842,416.19/1,128,078.02
  6. Step 6: Final answer
    x = 1,017,534.09

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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.