Home / 1,385,428.80-2,078,143.20-487,009.20

Finding the Fourth Proportional to 1,385,428.80, 2,078,143.20 and 487,009.20

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Solution

The fourth proportional to 1,385,428.80, 2,078,143.20 and 487,009.20 is: 730,513.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,428.80 : 2,078,143.20 = 487,009.20 : x
  2. Step 2: Convert to fraction form
    1,385,428.80/2,078,143.20 = 487,009.20/x
  3. Step 3: Cross multiply
    1,385,428.80x = 2,078,143.20 × 487,009.20
  4. Step 4: Simplify right side
    1,385,428.80x = 1,012,074,857,317.44
  5. Step 5: Solve for x
    x = 1,012,074,857,317.44/1,385,428.80
  6. Step 6: Final answer
    x = 730,513.80

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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.