Home / 1,387,205.60-2,080,808.40-389,933.60

Finding the Fourth Proportional to 1,387,205.60, 2,080,808.40 and 389,933.60

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Solution

The fourth proportional to 1,387,205.60, 2,080,808.40 and 389,933.60 is: 584,900.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,205.60 : 2,080,808.40 = 389,933.60 : x
  2. Step 2: Convert to fraction form
    1,387,205.60/2,080,808.40 = 389,933.60/x
  3. Step 3: Cross multiply
    1,387,205.60x = 2,080,808.40 × 389,933.60
  4. Step 4: Simplify right side
    1,387,205.60x = 811,377,110,322.24
  5. Step 5: Solve for x
    x = 811,377,110,322.24/1,387,205.60
  6. Step 6: Final answer
    x = 584,900.40

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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.