Home / 1,387,200.78-2,080,801.14-389,928.78

Finding the Fourth Proportional to 1,387,200.78, 2,080,801.14 and 389,928.78

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Solution

The fourth proportional to 1,387,200.78, 2,080,801.14 and 389,928.78 is: 584,893.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,200.78 : 2,080,801.14 = 389,928.78 : x
  2. Step 2: Convert to fraction form
    1,387,200.78/2,080,801.14 = 389,928.78/x
  3. Step 3: Cross multiply
    1,387,200.78x = 2,080,801.14 × 389,928.78
  4. Step 4: Simplify right side
    1,387,200.78x = 811,364,249,942.81
  5. Step 5: Solve for x
    x = 811,364,249,942.81/1,387,200.78
  6. Step 6: Final answer
    x = 584,893.16

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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.