Home / 1,187,989.20-1,782,421.20-389,296.80

Finding the Fourth Proportional to 1,187,989.20, 1,782,421.20 and 389,296.80

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Solution

The fourth proportional to 1,187,989.20, 1,782,421.20 and 389,296.80 is: 584,088.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,989.20 : 1,782,421.20 = 389,296.80 : x
  2. Step 2: Convert to fraction form
    1,187,989.20/1,782,421.20 = 389,296.80/x
  3. Step 3: Cross multiply
    1,187,989.20x = 1,782,421.20 × 389,296.80
  4. Step 4: Simplify right side
    1,187,989.20x = 693,890,869,412.16
  5. Step 5: Solve for x
    x = 693,890,869,412.16/1,187,989.20
  6. Step 6: Final answer
    x = 584,088.53

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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.