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Finding the Fourth Proportional to 907,486.80, 1,361,230.20 and 308,605.20

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Solution

The fourth proportional to 907,486.80, 1,361,230.20 and 308,605.20 is: 462,907.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,486.80 : 1,361,230.20 = 308,605.20 : x
  2. Step 2: Convert to fraction form
    907,486.80/1,361,230.20 = 308,605.20/x
  3. Step 3: Cross multiply
    907,486.80x = 1,361,230.20 × 308,605.20
  4. Step 4: Simplify right side
    907,486.80x = 420,082,718,117.04
  5. Step 5: Solve for x
    x = 420,082,718,117.04/907,486.80
  6. Step 6: Final answer
    x = 462,907.80

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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.