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Finding the Fourth Proportional to 522,820.40, 785,008.20 and 404,625.20

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Solution

The fourth proportional to 522,820.40, 785,008.20 and 404,625.20 is: 607,539.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,820.40 : 785,008.20 = 404,625.20 : x
  2. Step 2: Convert to fraction form
    522,820.40/785,008.20 = 404,625.20/x
  3. Step 3: Cross multiply
    522,820.40x = 785,008.20 × 404,625.20
  4. Step 4: Simplify right side
    522,820.40x = 317,634,099,926.64
  5. Step 5: Solve for x
    x = 317,634,099,926.64/522,820.40
  6. Step 6: Final answer
    x = 607,539.61

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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.