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Finding the Fourth Proportional to 813,863.70, 1,220,970.51 and 340,305.30

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Solution

The fourth proportional to 813,863.70, 1,220,970.51 and 340,305.30 is: 510,531.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,863.70 : 1,220,970.51 = 340,305.30 : x
  2. Step 2: Convert to fraction form
    813,863.70/1,220,970.51 = 340,305.30/x
  3. Step 3: Cross multiply
    813,863.70x = 1,220,970.51 × 340,305.30
  4. Step 4: Simplify right side
    813,863.70x = 415,502,735,696.70
  5. Step 5: Solve for x
    x = 415,502,735,696.70/813,863.70
  6. Step 6: Final answer
    x = 510,531.11

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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.