Home / 1,428,501.55-1,971,356.07-783,981.70

Finding the Fourth Proportional to 1,428,501.55, 1,971,356.07 and 783,981.70

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Solution

The fourth proportional to 1,428,501.55, 1,971,356.07 and 783,981.70 is: 1,081,907.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,501.55 : 1,971,356.07 = 783,981.70 : x
  2. Step 2: Convert to fraction form
    1,428,501.55/1,971,356.07 = 783,981.70/x
  3. Step 3: Cross multiply
    1,428,501.55x = 1,971,356.07 × 783,981.70
  4. Step 4: Simplify right side
    1,428,501.55x = 1,545,507,083,063.92
  5. Step 5: Solve for x
    x = 1,545,507,083,063.92/1,428,501.55
  6. Step 6: Final answer
    x = 1,081,907.88

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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.