Home / 820,005.35-1,131,609.02-457,419.78

Finding the Fourth Proportional to 820,005.35, 1,131,609.02 and 457,419.78

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Solution

The fourth proportional to 820,005.35, 1,131,609.02 and 457,419.78 is: 631,240.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,005.35 : 1,131,609.02 = 457,419.78 : x
  2. Step 2: Convert to fraction form
    820,005.35/1,131,609.02 = 457,419.78/x
  3. Step 3: Cross multiply
    820,005.35x = 1,131,609.02 × 457,419.78
  4. Step 4: Simplify right side
    820,005.35x = 517,620,346,687.32
  5. Step 5: Solve for x
    x = 517,620,346,687.32/820,005.35
  6. Step 6: Final answer
    x = 631,240.21

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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.