Home / 1,319,121.32-1,820,856.31-802,639.40

Finding the Fourth Proportional to 1,319,121.32, 1,820,856.31 and 802,639.40

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Solution

The fourth proportional to 1,319,121.32, 1,820,856.31 and 802,639.40 is: 1,107,927.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,121.32 : 1,820,856.31 = 802,639.40 : x
  2. Step 2: Convert to fraction form
    1,319,121.32/1,820,856.31 = 802,639.40/x
  3. Step 3: Cross multiply
    1,319,121.32x = 1,820,856.31 × 802,639.40
  4. Step 4: Simplify right side
    1,319,121.32x = 1,461,491,005,033.73
  5. Step 5: Solve for x
    x = 1,461,491,005,033.73/1,319,121.32
  6. Step 6: Final answer
    x = 1,107,927.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.