Home / 1,298,809.80-1,948,214.70-820,512.90

Finding the Fourth Proportional to 1,298,809.80, 1,948,214.70 and 820,512.90

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Solution

The fourth proportional to 1,298,809.80, 1,948,214.70 and 820,512.90 is: 1,230,769.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298,809.80 : 1,948,214.70 = 820,512.90 : x
  2. Step 2: Convert to fraction form
    1,298,809.80/1,948,214.70 = 820,512.90/x
  3. Step 3: Cross multiply
    1,298,809.80x = 1,948,214.70 × 820,512.90
  4. Step 4: Simplify right side
    1,298,809.80x = 1,598,535,293,319.63
  5. Step 5: Solve for x
    x = 1,598,535,293,319.63/1,298,809.80
  6. Step 6: Final answer
    x = 1,230,769.35

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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.