Home / 1,428,507.76-2,142,700.20-431,206

Finding the Fourth Proportional to 1,428,507.76, 2,142,700.20 and 431,206

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Solution

The fourth proportional to 1,428,507.76, 2,142,700.20 and 431,206 is: 646,790.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,507.76 : 2,142,700.20 = 431,206 : x
  2. Step 2: Convert to fraction form
    1,428,507.76/2,142,700.20 = 431,206/x
  3. Step 3: Cross multiply
    1,428,507.76x = 2,142,700.20 × 431,206
  4. Step 4: Simplify right side
    1,428,507.76x = 923,945,182,441.20
  5. Step 5: Solve for x
    x = 923,945,182,441.20/1,428,507.76
  6. Step 6: Final answer
    x = 646,790.45

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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.