Home / 1,390,639.25-2,086,282.37-431,043.95

Finding the Fourth Proportional to 1,390,639.25, 2,086,282.37 and 431,043.95

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Solution

The fourth proportional to 1,390,639.25, 2,086,282.37 and 431,043.95 is: 646,666.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,639.25 : 2,086,282.37 = 431,043.95 : x
  2. Step 2: Convert to fraction form
    1,390,639.25/2,086,282.37 = 431,043.95/x
  3. Step 3: Cross multiply
    1,390,639.25x = 2,086,282.37 × 431,043.95
  4. Step 4: Simplify right side
    1,390,639.25x = 899,279,399,873.48
  5. Step 5: Solve for x
    x = 899,279,399,873.48/1,390,639.25
  6. Step 6: Final answer
    x = 646,666.20

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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.