Home / 1,287,388.70-1,776,415.06-771,021.60

Finding the Fourth Proportional to 1,287,388.70, 1,776,415.06 and 771,021.60

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Solution

The fourth proportional to 1,287,388.70, 1,776,415.06 and 771,021.60 is: 1,063,901.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,388.70 : 1,776,415.06 = 771,021.60 : x
  2. Step 2: Convert to fraction form
    1,287,388.70/1,776,415.06 = 771,021.60/x
  3. Step 3: Cross multiply
    1,287,388.70x = 1,776,415.06 × 771,021.60
  4. Step 4: Simplify right side
    1,287,388.70x = 1,369,654,381,825.30
  5. Step 5: Solve for x
    x = 1,369,654,381,825.30/1,287,388.70
  6. Step 6: Final answer
    x = 1,063,901.20

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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.