Home / 920,009.20-1,380,013.80-288,986.80

Finding the Fourth Proportional to 920,009.20, 1,380,013.80 and 288,986.80

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Solution

The fourth proportional to 920,009.20, 1,380,013.80 and 288,986.80 is: 433,480.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,009.20 : 1,380,013.80 = 288,986.80 : x
  2. Step 2: Convert to fraction form
    920,009.20/1,380,013.80 = 288,986.80/x
  3. Step 3: Cross multiply
    920,009.20x = 1,380,013.80 × 288,986.80
  4. Step 4: Simplify right side
    920,009.20x = 398,805,772,017.84
  5. Step 5: Solve for x
    x = 398,805,772,017.84/920,009.20
  6. Step 6: Final answer
    x = 433,480.20

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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.