Home / 307,815.80-461,723.70-212,430.20

Finding the Fourth Proportional to 307,815.80, 461,723.70 and 212,430.20

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Solution

The fourth proportional to 307,815.80, 461,723.70 and 212,430.20 is: 318,645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,815.80 : 461,723.70 = 212,430.20 : x
  2. Step 2: Convert to fraction form
    307,815.80/461,723.70 = 212,430.20/x
  3. Step 3: Cross multiply
    307,815.80x = 461,723.70 × 212,430.20
  4. Step 4: Simplify right side
    307,815.80x = 98,084,057,935.74
  5. Step 5: Solve for x
    x = 98,084,057,935.74/307,815.80
  6. Step 6: Final answer
    x = 318,645.30

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1.5x scale

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.