Home / 403,916.80-605,875.20-137,977.60

Finding the Fourth Proportional to 403,916.80, 605,875.20 and 137,977.60

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Solution

The fourth proportional to 403,916.80, 605,875.20 and 137,977.60 is: 206,966.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,916.80 : 605,875.20 = 137,977.60 : x
  2. Step 2: Convert to fraction form
    403,916.80/605,875.20 = 137,977.60/x
  3. Step 3: Cross multiply
    403,916.80x = 605,875.20 × 137,977.60
  4. Step 4: Simplify right side
    403,916.80x = 83,597,205,995.52
  5. Step 5: Solve for x
    x = 83,597,205,995.52/403,916.80
  6. Step 6: Final answer
    x = 206,966.40

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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.