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Finding the Fourth Proportional to 438,008.40, 657,012.60 and 280,544.40

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Solution

The fourth proportional to 438,008.40, 657,012.60 and 280,544.40 is: 420,816.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,008.40 : 657,012.60 = 280,544.40 : x
  2. Step 2: Convert to fraction form
    438,008.40/657,012.60 = 280,544.40/x
  3. Step 3: Cross multiply
    438,008.40x = 657,012.60 × 280,544.40
  4. Step 4: Simplify right side
    438,008.40x = 184,321,205,659.44
  5. Step 5: Solve for x
    x = 184,321,205,659.44/438,008.40
  6. Step 6: Final answer
    x = 420,816.60

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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.