Home / 830,072.80-1,245,109.20-690,104.80

Finding the Fourth Proportional to 830,072.80, 1,245,109.20 and 690,104.80

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Solution

The fourth proportional to 830,072.80, 1,245,109.20 and 690,104.80 is: 1,035,157.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,072.80 : 1,245,109.20 = 690,104.80 : x
  2. Step 2: Convert to fraction form
    830,072.80/1,245,109.20 = 690,104.80/x
  3. Step 3: Cross multiply
    830,072.80x = 1,245,109.20 × 690,104.80
  4. Step 4: Simplify right side
    830,072.80x = 859,255,835,444.16
  5. Step 5: Solve for x
    x = 859,255,835,444.16/830,072.80
  6. Step 6: Final answer
    x = 1,035,157.20

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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.