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Finding the Fourth Proportional to 557,128.20, 835,692.30 and 521,698.80

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Solution

The fourth proportional to 557,128.20, 835,692.30 and 521,698.80 is: 782,548.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,128.20 : 835,692.30 = 521,698.80 : x
  2. Step 2: Convert to fraction form
    557,128.20/835,692.30 = 521,698.80/x
  3. Step 3: Cross multiply
    557,128.20x = 835,692.30 × 521,698.80
  4. Step 4: Simplify right side
    557,128.20x = 435,979,670,079.24
  5. Step 5: Solve for x
    x = 435,979,670,079.24/557,128.20
  6. Step 6: Final answer
    x = 782,548.20

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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.