Home / 628,810.97-868,335.53-399,442.19

Finding the Fourth Proportional to 628,810.97, 868,335.53 and 399,442.19

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Solution

The fourth proportional to 628,810.97, 868,335.53 and 399,442.19 is: 551,596.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,810.97 : 868,335.53 = 399,442.19 : x
  2. Step 2: Convert to fraction form
    628,810.97/868,335.53 = 399,442.19/x
  3. Step 3: Cross multiply
    628,810.97x = 868,335.53 × 399,442.19
  4. Step 4: Simplify right side
    628,810.97x = 346,849,839,419.12
  5. Step 5: Solve for x
    x = 346,849,839,419.12/628,810.97
  6. Step 6: Final answer
    x = 551,596.36

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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.