Home / 920,520.08-1,380,968.40-388,041.20

Finding the Fourth Proportional to 920,520.08, 1,380,968.40 and 388,041.20

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Solution

The fourth proportional to 920,520.08, 1,380,968.40 and 388,041.20 is: 582,141.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,520.08 : 1,380,968.40 = 388,041.20 : x
  2. Step 2: Convert to fraction form
    920,520.08/1,380,968.40 = 388,041.20/x
  3. Step 3: Cross multiply
    920,520.08x = 1,380,968.40 × 388,041.20
  4. Step 4: Simplify right side
    920,520.08x = 535,872,635,098.08
  5. Step 5: Solve for x
    x = 535,872,635,098.08/920,520.08
  6. Step 6: Final answer
    x = 582,141.17

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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.