Home / 385,051.28-531,359.88-215,301.20

Finding the Fourth Proportional to 385,051.28, 531,359.88 and 215,301.20

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Solution

The fourth proportional to 385,051.28, 531,359.88 and 215,301.20 is: 297,109.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,051.28 : 531,359.88 = 215,301.20 : x
  2. Step 2: Convert to fraction form
    385,051.28/531,359.88 = 215,301.20/x
  3. Step 3: Cross multiply
    385,051.28x = 531,359.88 × 215,301.20
  4. Step 4: Simplify right side
    385,051.28x = 114,402,419,795.86
  5. Step 5: Solve for x
    x = 114,402,419,795.86/385,051.28
  6. Step 6: Final answer
    x = 297,109.57

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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.