Home / 385,188.28-531,559.47-215,422

Finding the Fourth Proportional to 385,188.28, 531,559.47 and 215,422

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Solution

The fourth proportional to 385,188.28, 531,559.47 and 215,422 is: 297,282.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,188.28 : 531,559.47 = 215,422 : x
  2. Step 2: Convert to fraction form
    385,188.28/531,559.47 = 215,422/x
  3. Step 3: Cross multiply
    385,188.28x = 531,559.47 × 215,422
  4. Step 4: Simplify right side
    385,188.28x = 114,509,604,146.34
  5. Step 5: Solve for x
    x = 114,509,604,146.34/385,188.28
  6. Step 6: Final answer
    x = 297,282.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.