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Finding the Fourth Proportional to 622,615.80, 933,923.70 and 307,687.80

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Solution

The fourth proportional to 622,615.80, 933,923.70 and 307,687.80 is: 461,531.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,615.80 : 933,923.70 = 307,687.80 : x
  2. Step 2: Convert to fraction form
    622,615.80/933,923.70 = 307,687.80/x
  3. Step 3: Cross multiply
    622,615.80x = 933,923.70 × 307,687.80
  4. Step 4: Simplify right side
    622,615.80x = 287,356,928,620.86
  5. Step 5: Solve for x
    x = 287,356,928,620.86/622,615.80
  6. Step 6: Final answer
    x = 461,531.70

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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.