Home / 808,903.60-1,213,355.40-388,999.60

Finding the Fourth Proportional to 808,903.60, 1,213,355.40 and 388,999.60

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Solution

The fourth proportional to 808,903.60, 1,213,355.40 and 388,999.60 is: 583,499.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,903.60 : 1,213,355.40 = 388,999.60 : x
  2. Step 2: Convert to fraction form
    808,903.60/1,213,355.40 = 388,999.60/x
  3. Step 3: Cross multiply
    808,903.60x = 1,213,355.40 × 388,999.60
  4. Step 4: Simplify right side
    808,903.60x = 471,994,765,257.84
  5. Step 5: Solve for x
    x = 471,994,765,257.84/808,903.60
  6. Step 6: Final answer
    x = 583,499.40

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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.