Home / 420,935.83-631,409.22-140,453.08

Finding the Fourth Proportional to 420,935.83, 631,409.22 and 140,453.08

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Solution

The fourth proportional to 420,935.83, 631,409.22 and 140,453.08 is: 210,681.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,935.83 : 631,409.22 = 140,453.08 : x
  2. Step 2: Convert to fraction form
    420,935.83/631,409.22 = 140,453.08/x
  3. Step 3: Cross multiply
    420,935.83x = 631,409.22 × 140,453.08
  4. Step 4: Simplify right side
    420,935.83x = 88,683,368,110.87
  5. Step 5: Solve for x
    x = 88,683,368,110.87/420,935.83
  6. Step 6: Final answer
    x = 210,681.44

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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.