Home / 920,367.51-1,380,760.40-280,728.45

Finding the Fourth Proportional to 920,367.51, 1,380,760.40 and 280,728.45

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Solution

The fourth proportional to 920,367.51, 1,380,760.40 and 280,728.45 is: 421,156.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,367.51 : 1,380,760.40 = 280,728.45 : x
  2. Step 2: Convert to fraction form
    920,367.51/1,380,760.40 = 280,728.45/x
  3. Step 3: Cross multiply
    920,367.51x = 1,380,760.40 × 280,728.45
  4. Step 4: Simplify right side
    920,367.51x = 387,618,721,000.57
  5. Step 5: Solve for x
    x = 387,618,721,000.57/920,367.51
  6. Step 6: Final answer
    x = 421,156.46

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Double scale
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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.