Home / 819,620.90-1,229,431.35-788,128.10

Finding the Fourth Proportional to 819,620.90, 1,229,431.35 and 788,128.10

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Solution

The fourth proportional to 819,620.90, 1,229,431.35 and 788,128.10 is: 1,182,192.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,620.90 : 1,229,431.35 = 788,128.10 : x
  2. Step 2: Convert to fraction form
    819,620.90/1,229,431.35 = 788,128.10/x
  3. Step 3: Cross multiply
    819,620.90x = 1,229,431.35 × 788,128.10
  4. Step 4: Simplify right side
    819,620.90x = 968,949,393,955.94
  5. Step 5: Solve for x
    x = 968,949,393,955.94/819,620.90
  6. Step 6: Final answer
    x = 1,182,192.15

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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.