Home / 1,237,109.30-1,852,513.80-815,105.78

Finding the Fourth Proportional to 1,237,109.30, 1,852,513.80 and 815,105.78

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Solution

The fourth proportional to 1,237,109.30, 1,852,513.80 and 815,105.78 is: 1,220,583.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237,109.30 : 1,852,513.80 = 815,105.78 : x
  2. Step 2: Convert to fraction form
    1,237,109.30/1,852,513.80 = 815,105.78/x
  3. Step 3: Cross multiply
    1,237,109.30x = 1,852,513.80 × 815,105.78
  4. Step 4: Simplify right side
    1,237,109.30x = 1,509,994,705,909.76
  5. Step 5: Solve for x
    x = 1,509,994,705,909.76/1,237,109.30
  6. Step 6: Final answer
    x = 1,220,583.10

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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.