Home / 1,386,392.40-2,080,279.80-787,813.20

Finding the Fourth Proportional to 1,386,392.40, 2,080,279.80 and 787,813.20

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Solution

The fourth proportional to 1,386,392.40, 2,080,279.80 and 787,813.20 is: 1,182,112.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,392.40 : 2,080,279.80 = 787,813.20 : x
  2. Step 2: Convert to fraction form
    1,386,392.40/2,080,279.80 = 787,813.20/x
  3. Step 3: Cross multiply
    1,386,392.40x = 2,080,279.80 × 787,813.20
  4. Step 4: Simplify right side
    1,386,392.40x = 1,638,871,886,133.36
  5. Step 5: Solve for x
    x = 1,638,871,886,133.36/1,386,392.40
  6. Step 6: Final answer
    x = 1,182,112.57

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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.