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Finding the Fourth Proportional to 1,052,965.88, 1,579,645.65 and 421,928.90

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Solution

The fourth proportional to 1,052,965.88, 1,579,645.65 and 421,928.90 is: 632,972.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,052,965.88 : 1,579,645.65 = 421,928.90 : x
  2. Step 2: Convert to fraction form
    1,052,965.88/1,579,645.65 = 421,928.90/x
  3. Step 3: Cross multiply
    1,052,965.88x = 1,579,645.65 × 421,928.90
  4. Step 4: Simplify right side
    1,052,965.88x = 666,498,151,494.29
  5. Step 5: Solve for x
    x = 666,498,151,494.29/1,052,965.88
  6. Step 6: Final answer
    x = 632,972.22

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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.