Home / 428,614.11-643,055.04-258,022.62

Finding the Fourth Proportional to 428,614.11, 643,055.04 and 258,022.62

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Solution

The fourth proportional to 428,614.11, 643,055.04 and 258,022.62 is: 387,114.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,614.11 : 643,055.04 = 258,022.62 : x
  2. Step 2: Convert to fraction form
    428,614.11/643,055.04 = 258,022.62/x
  3. Step 3: Cross multiply
    428,614.11x = 643,055.04 × 258,022.62
  4. Step 4: Simplify right side
    428,614.11x = 165,922,746,225.01
  5. Step 5: Solve for x
    x = 165,922,746,225.01/428,614.11
  6. Step 6: Final answer
    x = 387,114.52

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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.