Home / 812,243.52-1,218,405.60-213,206.40

Finding the Fourth Proportional to 812,243.52, 1,218,405.60 and 213,206.40

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Solution

The fourth proportional to 812,243.52, 1,218,405.60 and 213,206.40 is: 319,820.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,243.52 : 1,218,405.60 = 213,206.40 : x
  2. Step 2: Convert to fraction form
    812,243.52/1,218,405.60 = 213,206.40/x
  3. Step 3: Cross multiply
    812,243.52x = 1,218,405.60 × 213,206.40
  4. Step 4: Simplify right side
    812,243.52x = 259,771,871,715.84
  5. Step 5: Solve for x
    x = 259,771,871,715.84/812,243.52
  6. Step 6: Final answer
    x = 319,820.18

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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.