Home / 1,378,920.80-2,068,381.20-670,332.80

Finding the Fourth Proportional to 1,378,920.80, 2,068,381.20 and 670,332.80

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Solution

The fourth proportional to 1,378,920.80, 2,068,381.20 and 670,332.80 is: 1,005,499.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378,920.80 : 2,068,381.20 = 670,332.80 : x
  2. Step 2: Convert to fraction form
    1,378,920.80/2,068,381.20 = 670,332.80/x
  3. Step 3: Cross multiply
    1,378,920.80x = 2,068,381.20 × 670,332.80
  4. Step 4: Simplify right side
    1,378,920.80x = 1,386,503,761,263.36
  5. Step 5: Solve for x
    x = 1,386,503,761,263.36/1,378,920.80
  6. Step 6: Final answer
    x = 1,005,499.20

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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.