Home / 1,291,210.80-1,936,816.20-392,645.40

Finding the Fourth Proportional to 1,291,210.80, 1,936,816.20 and 392,645.40

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Solution

The fourth proportional to 1,291,210.80, 1,936,816.20 and 392,645.40 is: 588,968.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,210.80 : 1,936,816.20 = 392,645.40 : x
  2. Step 2: Convert to fraction form
    1,291,210.80/1,936,816.20 = 392,645.40/x
  3. Step 3: Cross multiply
    1,291,210.80x = 1,936,816.20 × 392,645.40
  4. Step 4: Simplify right side
    1,291,210.80x = 760,481,971,575.48
  5. Step 5: Solve for x
    x = 760,481,971,575.48/1,291,210.80
  6. Step 6: Final answer
    x = 588,968.10

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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.