Home / 830,005.20-1,245,007.80-812,509.20

Finding the Fourth Proportional to 830,005.20, 1,245,007.80 and 812,509.20

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Solution

The fourth proportional to 830,005.20, 1,245,007.80 and 812,509.20 is: 1,218,763.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,005.20 : 1,245,007.80 = 812,509.20 : x
  2. Step 2: Convert to fraction form
    830,005.20/1,245,007.80 = 812,509.20/x
  3. Step 3: Cross multiply
    830,005.20x = 1,245,007.80 × 812,509.20
  4. Step 4: Simplify right side
    830,005.20x = 1,011,580,291,571.76
  5. Step 5: Solve for x
    x = 1,011,580,291,571.76/830,005.20
  6. Step 6: Final answer
    x = 1,218,763.80

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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.