Home / 686,648.40-1,029,972.60-313,400.40

Finding the Fourth Proportional to 686,648.40, 1,029,972.60 and 313,400.40

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Solution

The fourth proportional to 686,648.40, 1,029,972.60 and 313,400.40 is: 470,100.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,648.40 : 1,029,972.60 = 313,400.40 : x
  2. Step 2: Convert to fraction form
    686,648.40/1,029,972.60 = 313,400.40/x
  3. Step 3: Cross multiply
    686,648.40x = 1,029,972.60 × 313,400.40
  4. Step 4: Simplify right side
    686,648.40x = 322,793,824,829.04
  5. Step 5: Solve for x
    x = 322,793,824,829.04/686,648.40
  6. Step 6: Final answer
    x = 470,100.60

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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.