Home / 830,079.80-1,245,119.70-690,111.80

Finding the Fourth Proportional to 830,079.80, 1,245,119.70 and 690,111.80

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Solution

The fourth proportional to 830,079.80, 1,245,119.70 and 690,111.80 is: 1,035,167.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,079.80 : 1,245,119.70 = 690,111.80 : x
  2. Step 2: Convert to fraction form
    830,079.80/1,245,119.70 = 690,111.80/x
  3. Step 3: Cross multiply
    830,079.80x = 1,245,119.70 × 690,111.80
  4. Step 4: Simplify right side
    830,079.80x = 859,271,797,382.46
  5. Step 5: Solve for x
    x = 859,271,797,382.46/830,079.80
  6. Step 6: Final answer
    x = 1,035,167.70

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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.