Home / 431,081,206.40-646,621,809.60-212,836,102.40

Finding the Fourth Proportional to 431,081,206.40, 646,621,809.60 and 212,836,102.40

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Solution

The fourth proportional to 431,081,206.40, 646,621,809.60 and 212,836,102.40 is: 319,254,153.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,081,206.40 : 646,621,809.60 = 212,836,102.40 : x
  2. Step 2: Convert to fraction form
    431,081,206.40/646,621,809.60 = 212,836,102.40/x
  3. Step 3: Cross multiply
    431,081,206.40x = 646,621,809.60 × 212,836,102.40
  4. Step 4: Simplify right side
    431,081,206.40x = 137,624,465,682,098,912
  5. Step 5: Solve for x
    x = 137,624,465,682,098,912/431,081,206.40
  6. Step 6: Final answer
    x = 319,254,153.60

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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.