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Finding the Fourth Proportional to 626,405.40, 939,608.10 and 360,028.80

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Solution

The fourth proportional to 626,405.40, 939,608.10 and 360,028.80 is: 540,043.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,405.40 : 939,608.10 = 360,028.80 : x
  2. Step 2: Convert to fraction form
    626,405.40/939,608.10 = 360,028.80/x
  3. Step 3: Cross multiply
    626,405.40x = 939,608.10 × 360,028.80
  4. Step 4: Simplify right side
    626,405.40x = 338,285,976,713.28
  5. Step 5: Solve for x
    x = 338,285,976,713.28/626,405.40
  6. Step 6: Final answer
    x = 540,043.20

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Similar ratio
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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.