Home / 753,376.80-1,128,315.60-515,431.20

Finding the Fourth Proportional to 753,376.80, 1,128,315.60 and 515,431.20

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Solution

The fourth proportional to 753,376.80, 1,128,315.60 and 515,431.20 is: 771,949.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    753,376.80 : 1,128,315.60 = 515,431.20 : x
  2. Step 2: Convert to fraction form
    753,376.80/1,128,315.60 = 515,431.20/x
  3. Step 3: Cross multiply
    753,376.80x = 1,128,315.60 × 515,431.20
  4. Step 4: Simplify right side
    753,376.80x = 581,569,063,686.72
  5. Step 5: Solve for x
    x = 581,569,063,686.72/753,376.80
  6. Step 6: Final answer
    x = 771,949.79

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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.