Home / 811,988.80-1,217,895.70-213,010

Finding the Fourth Proportional to 811,988.80, 1,217,895.70 and 213,010

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Solution

The fourth proportional to 811,988.80, 1,217,895.70 and 213,010 is: 319,492.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,988.80 : 1,217,895.70 = 213,010 : x
  2. Step 2: Convert to fraction form
    811,988.80/1,217,895.70 = 213,010/x
  3. Step 3: Cross multiply
    811,988.80x = 1,217,895.70 × 213,010
  4. Step 4: Simplify right side
    811,988.80x = 259,423,963,057
  5. Step 5: Solve for x
    x = 259,423,963,057/811,988.80
  6. Step 6: Final answer
    x = 319,492.05

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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.