Home / 685,862.28-1,028,417.58-212,416.20

Finding the Fourth Proportional to 685,862.28, 1,028,417.58 and 212,416.20

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Solution

The fourth proportional to 685,862.28, 1,028,417.58 and 212,416.20 is: 318,507.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,862.28 : 1,028,417.58 = 212,416.20 : x
  2. Step 2: Convert to fraction form
    685,862.28/1,028,417.58 = 212,416.20/x
  3. Step 3: Cross multiply
    685,862.28x = 1,028,417.58 × 212,416.20
  4. Step 4: Simplify right side
    685,862.28x = 218,452,554,356.80
  5. Step 5: Solve for x
    x = 218,452,554,356.80/685,862.28
  6. Step 6: Final answer
    x = 318,507.90

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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.