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Finding the Fourth Proportional to 388,009.20, 582,013.80 and 360,015.60

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Solution

The fourth proportional to 388,009.20, 582,013.80 and 360,015.60 is: 540,023.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,009.20 : 582,013.80 = 360,015.60 : x
  2. Step 2: Convert to fraction form
    388,009.20/582,013.80 = 360,015.60/x
  3. Step 3: Cross multiply
    388,009.20x = 582,013.80 × 360,015.60
  4. Step 4: Simplify right side
    388,009.20x = 209,534,047,415.28
  5. Step 5: Solve for x
    x = 209,534,047,415.28/388,009.20
  6. Step 6: Final answer
    x = 540,023.40

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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.