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Finding the Fourth Proportional to 606,985.10, 911,461.80 and 439,679.60

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Solution

The fourth proportional to 606,985.10, 911,461.80 and 439,679.60 is: 660,232.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,985.10 : 911,461.80 = 439,679.60 : x
  2. Step 2: Convert to fraction form
    606,985.10/911,461.80 = 439,679.60/x
  3. Step 3: Cross multiply
    606,985.10x = 911,461.80 × 439,679.60
  4. Step 4: Simplify right side
    606,985.10x = 400,751,159,639.28
  5. Step 5: Solve for x
    x = 400,751,159,639.28/606,985.10
  6. Step 6: Final answer
    x = 660,232.29

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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.