Home / 3,118,981.20-4,678,034.40-989,280.60

Finding the Fourth Proportional to 3,118,981.20, 4,678,034.40 and 989,280.60

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Solution

The fourth proportional to 3,118,981.20, 4,678,034.40 and 989,280.60 is: 1,483,782.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118,981.20 : 4,678,034.40 = 989,280.60 : x
  2. Step 2: Convert to fraction form
    3,118,981.20/4,678,034.40 = 989,280.60/x
  3. Step 3: Cross multiply
    3,118,981.20x = 4,678,034.40 × 989,280.60
  4. Step 4: Simplify right side
    3,118,981.20x = 4,627,888,678,052.64
  5. Step 5: Solve for x
    x = 4,627,888,678,052.64/3,118,981.20
  6. Step 6: Final answer
    x = 1,483,782.17

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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.