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Finding the Fourth Proportional to 628,855.20, 943,282.80 and 313,927.20

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Solution

The fourth proportional to 628,855.20, 943,282.80 and 313,927.20 is: 470,890.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,855.20 : 943,282.80 = 313,927.20 : x
  2. Step 2: Convert to fraction form
    628,855.20/943,282.80 = 313,927.20/x
  3. Step 3: Cross multiply
    628,855.20x = 943,282.80 × 313,927.20
  4. Step 4: Simplify right side
    628,855.20x = 296,122,128,212.16
  5. Step 5: Solve for x
    x = 296,122,128,212.16/628,855.20
  6. Step 6: Final answer
    x = 470,890.80

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Half scale
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Double scale
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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.