Home / 1,428,478.20-1,971,356.77-783,921.46

Finding the Fourth Proportional to 1,428,478.20, 1,971,356.77 and 783,921.46

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Solution

The fourth proportional to 1,428,478.20, 1,971,356.77 and 783,921.46 is: 1,081,842.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,478.20 : 1,971,356.77 = 783,921.46 : x
  2. Step 2: Convert to fraction form
    1,428,478.20/1,971,356.77 = 783,921.46/x
  3. Step 3: Cross multiply
    1,428,478.20x = 1,971,356.77 × 783,921.46
  4. Step 4: Simplify right side
    1,428,478.20x = 1,545,388,877,319.28
  5. Step 5: Solve for x
    x = 1,545,388,877,319.28/1,428,478.20
  6. Step 6: Final answer
    x = 1,081,842.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.