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Finding the Fourth Proportional to 1,420,849.04, 1,960,799.89 and 776,309.16

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Solution

The fourth proportional to 1,420,849.04, 1,960,799.89 and 776,309.16 is: 1,071,322.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420,849.04 : 1,960,799.89 = 776,309.16 : x
  2. Step 2: Convert to fraction form
    1,420,849.04/1,960,799.89 = 776,309.16/x
  3. Step 3: Cross multiply
    1,420,849.04x = 1,960,799.89 × 776,309.16
  4. Step 4: Simplify right side
    1,420,849.04x = 1,522,186,915,533.99
  5. Step 5: Solve for x
    x = 1,522,186,915,533.99/1,420,849.04
  6. Step 6: Final answer
    x = 1,071,322.06

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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.