Home / 385,016.32-577,406.76-135,640

Finding the Fourth Proportional to 385,016.32, 577,406.76 and 135,640

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Solution

The fourth proportional to 385,016.32, 577,406.76 and 135,640 is: 203,418.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,016.32 : 577,406.76 = 135,640 : x
  2. Step 2: Convert to fraction form
    385,016.32/577,406.76 = 135,640/x
  3. Step 3: Cross multiply
    385,016.32x = 577,406.76 × 135,640
  4. Step 4: Simplify right side
    385,016.32x = 78,319,452,926.40
  5. Step 5: Solve for x
    x = 78,319,452,926.40/385,016.32
  6. Step 6: Final answer
    x = 203,418.53

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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.