Home / 1,319,125.80-1,978,688.70-862,480.20

Finding the Fourth Proportional to 1,319,125.80, 1,978,688.70 and 862,480.20

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Solution

The fourth proportional to 1,319,125.80, 1,978,688.70 and 862,480.20 is: 1,293,720.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,125.80 : 1,978,688.70 = 862,480.20 : x
  2. Step 2: Convert to fraction form
    1,319,125.80/1,978,688.70 = 862,480.20/x
  3. Step 3: Cross multiply
    1,319,125.80x = 1,978,688.70 × 862,480.20
  4. Step 4: Simplify right side
    1,319,125.80x = 1,706,579,825,713.74
  5. Step 5: Solve for x
    x = 1,706,579,825,713.74/1,319,125.80
  6. Step 6: Final answer
    x = 1,293,720.30

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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.