Home / 811,670.31-1,120,106.34-449,109.45

Finding the Fourth Proportional to 811,670.31, 1,120,106.34 and 449,109.45

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Solution

The fourth proportional to 811,670.31, 1,120,106.34 and 449,109.45 is: 619,771.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,670.31 : 1,120,106.34 = 449,109.45 : x
  2. Step 2: Convert to fraction form
    811,670.31/1,120,106.34 = 449,109.45/x
  3. Step 3: Cross multiply
    811,670.31x = 1,120,106.34 × 449,109.45
  4. Step 4: Simplify right side
    811,670.31x = 503,050,342,298.91
  5. Step 5: Solve for x
    x = 503,050,342,298.91/811,670.31
  6. Step 6: Final answer
    x = 619,771.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.