Home / 389,287.20-583,527.60-211,418.40

Finding the Fourth Proportional to 389,287.20, 583,527.60 and 211,418.40

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Solution

The fourth proportional to 389,287.20, 583,527.60 and 211,418.40 is: 316,908.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,287.20 : 583,527.60 = 211,418.40 : x
  2. Step 2: Convert to fraction form
    389,287.20/583,527.60 = 211,418.40/x
  3. Step 3: Cross multiply
    389,287.20x = 583,527.60 × 211,418.40
  4. Step 4: Simplify right side
    389,287.20x = 123,368,471,547.84
  5. Step 5: Solve for x
    x = 123,368,471,547.84/389,287.20
  6. Step 6: Final answer
    x = 316,908.63

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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.