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Finding the Fourth Proportional to 411,247.80, 616,871.70 and 317,820.60

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Solution

The fourth proportional to 411,247.80, 616,871.70 and 317,820.60 is: 476,730.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,247.80 : 616,871.70 = 317,820.60 : x
  2. Step 2: Convert to fraction form
    411,247.80/616,871.70 = 317,820.60/x
  3. Step 3: Cross multiply
    411,247.80x = 616,871.70 × 317,820.60
  4. Step 4: Simplify right side
    411,247.80x = 196,054,533,817.02
  5. Step 5: Solve for x
    x = 196,054,533,817.02/411,247.80
  6. Step 6: Final answer
    x = 476,730.90

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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.