Home / 813,128.32-1,219,856.10-280,669.96

Finding the Fourth Proportional to 813,128.32, 1,219,856.10 and 280,669.96

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Solution

The fourth proportional to 813,128.32, 1,219,856.10 and 280,669.96 is: 421,061.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,128.32 : 1,219,856.10 = 280,669.96 : x
  2. Step 2: Convert to fraction form
    813,128.32/1,219,856.10 = 280,669.96/x
  3. Step 3: Cross multiply
    813,128.32x = 1,219,856.10 × 280,669.96
  4. Step 4: Simplify right side
    813,128.32x = 342,376,962,792.76
  5. Step 5: Solve for x
    x = 342,376,962,792.76/813,128.32
  6. Step 6: Final answer
    x = 421,061.42

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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.