Home / 1,385,042.40-2,077,045.20-486,136.80

Finding the Fourth Proportional to 1,385,042.40, 2,077,045.20 and 486,136.80

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Solution

The fourth proportional to 1,385,042.40, 2,077,045.20 and 486,136.80 is: 729,023.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,042.40 : 2,077,045.20 = 486,136.80 : x
  2. Step 2: Convert to fraction form
    1,385,042.40/2,077,045.20 = 486,136.80/x
  3. Step 3: Cross multiply
    1,385,042.40x = 2,077,045.20 × 486,136.80
  4. Step 4: Simplify right side
    1,385,042.40x = 1,009,728,106,983.36
  5. Step 5: Solve for x
    x = 1,009,728,106,983.36/1,385,042.40
  6. Step 6: Final answer
    x = 729,023.25

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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.