Home / 811,535.80-1,215,699.90-711,808.60

Finding the Fourth Proportional to 811,535.80, 1,215,699.90 and 711,808.60

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Solution

The fourth proportional to 811,535.80, 1,215,699.90 and 711,808.60 is: 1,066,306.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,535.80 : 1,215,699.90 = 711,808.60 : x
  2. Step 2: Convert to fraction form
    811,535.80/1,215,699.90 = 711,808.60/x
  3. Step 3: Cross multiply
    811,535.80x = 1,215,699.90 × 711,808.60
  4. Step 4: Simplify right side
    811,535.80x = 865,345,643,839.14
  5. Step 5: Solve for x
    x = 865,345,643,839.14/811,535.80
  6. Step 6: Final answer
    x = 1,066,306.19

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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.