Home / 811,633.74-1,217,438.28-279,159.42

Finding the Fourth Proportional to 811,633.74, 1,217,438.28 and 279,159.42

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Solution

The fourth proportional to 811,633.74, 1,217,438.28 and 279,159.42 is: 418,734.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,633.74 : 1,217,438.28 = 279,159.42 : x
  2. Step 2: Convert to fraction form
    811,633.74/1,217,438.28 = 279,159.42/x
  3. Step 3: Cross multiply
    811,633.74x = 1,217,438.28 × 279,159.42
  4. Step 4: Simplify right side
    811,633.74x = 339,859,364,130.60
  5. Step 5: Solve for x
    x = 339,859,364,130.60/811,633.74
  6. Step 6: Final answer
    x = 418,734.89

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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.