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Finding the Fourth Proportional to 385,656.20, 579,866.70 and 324,830.60

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Solution

The fourth proportional to 385,656.20, 579,866.70 and 324,830.60 is: 488,410.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,656.20 : 579,866.70 = 324,830.60 : x
  2. Step 2: Convert to fraction form
    385,656.20/579,866.70 = 324,830.60/x
  3. Step 3: Cross multiply
    385,656.20x = 579,866.70 × 324,830.60
  4. Step 4: Simplify right side
    385,656.20x = 188,358,448,081.02
  5. Step 5: Solve for x
    x = 188,358,448,081.02/385,656.20
  6. Step 6: Final answer
    x = 488,410.27

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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.