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Finding the Fourth Proportional to 620,615.80, 930,923.70 and 305,687.80

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Solution

The fourth proportional to 620,615.80, 930,923.70 and 305,687.80 is: 458,531.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,615.80 : 930,923.70 = 305,687.80 : x
  2. Step 2: Convert to fraction form
    620,615.80/930,923.70 = 305,687.80/x
  3. Step 3: Cross multiply
    620,615.80x = 930,923.70 × 305,687.80
  4. Step 4: Simplify right side
    620,615.80x = 284,572,017,820.86
  5. Step 5: Solve for x
    x = 284,572,017,820.86/620,615.80
  6. Step 6: Final answer
    x = 458,531.70

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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.