Home / 690,643.20-953,084.16-388,839.36

Finding the Fourth Proportional to 690,643.20, 953,084.16 and 388,839.36

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Solution

The fourth proportional to 690,643.20, 953,084.16 and 388,839.36 is: 536,596.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,643.20 : 953,084.16 = 388,839.36 : x
  2. Step 2: Convert to fraction form
    690,643.20/953,084.16 = 388,839.36/x
  3. Step 3: Cross multiply
    690,643.20x = 953,084.16 × 388,839.36
  4. Step 4: Simplify right side
    690,643.20x = 370,596,634,800.54
  5. Step 5: Solve for x
    x = 370,596,634,800.54/690,643.20
  6. Step 6: Final answer
    x = 536,596.37

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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.