Home / 811,649.72-1,217,640.63-279,101.58

Finding the Fourth Proportional to 811,649.72, 1,217,640.63 and 279,101.58

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Solution

The fourth proportional to 811,649.72, 1,217,640.63 and 279,101.58 is: 418,709.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,649.72 : 1,217,640.63 = 279,101.58 : x
  2. Step 2: Convert to fraction form
    811,649.72/1,217,640.63 = 279,101.58/x
  3. Step 3: Cross multiply
    811,649.72x = 1,217,640.63 × 279,101.58
  4. Step 4: Simplify right side
    811,649.72x = 339,845,423,705.20
  5. Step 5: Solve for x
    x = 339,845,423,705.20/811,649.72
  6. Step 6: Final answer
    x = 418,709.47

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1.5x scale

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.