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Finding the Fourth Proportional to 806,618.60, 1,209,636.30 and 407,126.60

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Solution

The fourth proportional to 806,618.60, 1,209,636.30 and 407,126.60 is: 610,542.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,618.60 : 1,209,636.30 = 407,126.60 : x
  2. Step 2: Convert to fraction form
    806,618.60/1,209,636.30 = 407,126.60/x
  3. Step 3: Cross multiply
    806,618.60x = 1,209,636.30 × 407,126.60
  4. Step 4: Simplify right side
    806,618.60x = 492,475,114,055.58
  5. Step 5: Solve for x
    x = 492,475,114,055.58/806,618.60
  6. Step 6: Final answer
    x = 610,542.72

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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.