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Finding the Fourth Proportional to 662,138.40, 995,281.20 and 649,696.80

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Solution

The fourth proportional to 662,138.40, 995,281.20 and 649,696.80 is: 976,579.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,138.40 : 995,281.20 = 649,696.80 : x
  2. Step 2: Convert to fraction form
    662,138.40/995,281.20 = 649,696.80/x
  3. Step 3: Cross multiply
    662,138.40x = 995,281.20 × 649,696.80
  4. Step 4: Simplify right side
    662,138.40x = 646,631,010,740.16
  5. Step 5: Solve for x
    x = 646,631,010,740.16/662,138.40
  6. Step 6: Final answer
    x = 976,579.84

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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.