Home / 820,420.25-1,132,173.39-476,288.12

Finding the Fourth Proportional to 820,420.25, 1,132,173.39 and 476,288.12

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Solution

The fourth proportional to 820,420.25, 1,132,173.39 and 476,288.12 is: 657,273.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,420.25 : 1,132,173.39 = 476,288.12 : x
  2. Step 2: Convert to fraction form
    820,420.25/1,132,173.39 = 476,288.12/x
  3. Step 3: Cross multiply
    820,420.25x = 1,132,173.39 × 476,288.12
  4. Step 4: Simplify right side
    820,420.25x = 539,240,732,345.61
  5. Step 5: Solve for x
    x = 539,240,732,345.61/820,420.25
  6. Step 6: Final answer
    x = 657,273.79

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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.