Home / 811,700.76-1,120,051.08-449,076.72

Finding the Fourth Proportional to 811,700.76, 1,120,051.08 and 449,076.72

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Solution

The fourth proportional to 811,700.76, 1,120,051.08 and 449,076.72 is: 619,672.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,700.76 : 1,120,051.08 = 449,076.72 : x
  2. Step 2: Convert to fraction form
    811,700.76/1,120,051.08 = 449,076.72/x
  3. Step 3: Cross multiply
    811,700.76x = 1,120,051.08 × 449,076.72
  4. Step 4: Simplify right side
    811,700.76x = 502,988,865,238.86
  5. Step 5: Solve for x
    x = 502,988,865,238.86/811,700.76
  6. Step 6: Final answer
    x = 619,672.78

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Double scale
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1.5x scale

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.