Home / 1,123,210.28-1,550,029.86-639,820.20

Finding the Fourth Proportional to 1,123,210.28, 1,550,029.86 and 639,820.20

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Solution

The fourth proportional to 1,123,210.28, 1,550,029.86 and 639,820.20 is: 882,951.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123,210.28 : 1,550,029.86 = 639,820.20 : x
  2. Step 2: Convert to fraction form
    1,123,210.28/1,550,029.86 = 639,820.20/x
  3. Step 3: Cross multiply
    1,123,210.28x = 1,550,029.86 × 639,820.20
  4. Step 4: Simplify right side
    1,123,210.28x = 991,740,415,031.17
  5. Step 5: Solve for x
    x = 991,740,415,031.17/1,123,210.28
  6. Step 6: Final answer
    x = 882,951.69

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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.