Home / 811,938.80-1,218,199.80-338,769.20

Finding the Fourth Proportional to 811,938.80, 1,218,199.80 and 338,769.20

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Solution

The fourth proportional to 811,938.80, 1,218,199.80 and 338,769.20 is: 508,275.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,938.80 : 1,218,199.80 = 338,769.20 : x
  2. Step 2: Convert to fraction form
    811,938.80/1,218,199.80 = 338,769.20/x
  3. Step 3: Cross multiply
    811,938.80x = 1,218,199.80 × 338,769.20
  4. Step 4: Simplify right side
    811,938.80x = 412,688,571,686.16
  5. Step 5: Solve for x
    x = 412,688,571,686.16/811,938.80
  6. Step 6: Final answer
    x = 508,275.47

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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.