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Finding the Fourth Proportional to 613,128.40, 919,692.60 and 515,150.80

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Solution

The fourth proportional to 613,128.40, 919,692.60 and 515,150.80 is: 772,726.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,128.40 : 919,692.60 = 515,150.80 : x
  2. Step 2: Convert to fraction form
    613,128.40/919,692.60 = 515,150.80/x
  3. Step 3: Cross multiply
    613,128.40x = 919,692.60 × 515,150.80
  4. Step 4: Simplify right side
    613,128.40x = 473,780,378,644.08
  5. Step 5: Solve for x
    x = 473,780,378,644.08/613,128.40
  6. Step 6: Final answer
    x = 772,726.20

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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.