Home / 820,860.60-1,230,254.10-399,228.60

Finding the Fourth Proportional to 820,860.60, 1,230,254.10 and 399,228.60

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Solution

The fourth proportional to 820,860.60, 1,230,254.10 and 399,228.60 is: 598,338.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,860.60 : 1,230,254.10 = 399,228.60 : x
  2. Step 2: Convert to fraction form
    820,860.60/1,230,254.10 = 399,228.60/x
  3. Step 3: Cross multiply
    820,860.60x = 1,230,254.10 × 399,228.60
  4. Step 4: Simplify right side
    820,860.60x = 491,152,621,987.26
  5. Step 5: Solve for x
    x = 491,152,621,987.26/820,860.60
  6. Step 6: Final answer
    x = 598,338.65

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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.