Home / 812,928.32-1,220,180.96-392,499.52

Finding the Fourth Proportional to 812,928.32, 1,220,180.96 and 392,499.52

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Solution

The fourth proportional to 812,928.32, 1,220,180.96 and 392,499.52 is: 589,129.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,928.32 : 1,220,180.96 = 392,499.52 : x
  2. Step 2: Convert to fraction form
    812,928.32/1,220,180.96 = 392,499.52/x
  3. Step 3: Cross multiply
    812,928.32x = 1,220,180.96 × 392,499.52
  4. Step 4: Simplify right side
    812,928.32x = 478,920,441,113.14
  5. Step 5: Solve for x
    x = 478,920,441,113.14/812,928.32
  6. Step 6: Final answer
    x = 589,129.98

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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.