Home / 680,928.40-1,021,392.60-345,005.20

Finding the Fourth Proportional to 680,928.40, 1,021,392.60 and 345,005.20

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Solution

The fourth proportional to 680,928.40, 1,021,392.60 and 345,005.20 is: 517,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,928.40 : 1,021,392.60 = 345,005.20 : x
  2. Step 2: Convert to fraction form
    680,928.40/1,021,392.60 = 345,005.20/x
  3. Step 3: Cross multiply
    680,928.40x = 1,021,392.60 × 345,005.20
  4. Step 4: Simplify right side
    680,928.40x = 352,385,758,241.52
  5. Step 5: Solve for x
    x = 352,385,758,241.52/680,928.40
  6. Step 6: Final answer
    x = 517,507.80

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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.