Home / 1,220,007.80-1,830,011.70-905,079.80

Finding the Fourth Proportional to 1,220,007.80, 1,830,011.70 and 905,079.80

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Solution

The fourth proportional to 1,220,007.80, 1,830,011.70 and 905,079.80 is: 1,357,619.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220,007.80 : 1,830,011.70 = 905,079.80 : x
  2. Step 2: Convert to fraction form
    1,220,007.80/1,830,011.70 = 905,079.80/x
  3. Step 3: Cross multiply
    1,220,007.80x = 1,830,011.70 × 905,079.80
  4. Step 4: Simplify right side
    1,220,007.80x = 1,656,306,623,433.66
  5. Step 5: Solve for x
    x = 1,656,306,623,433.66/1,220,007.80
  6. Step 6: Final answer
    x = 1,357,619.70

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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.