Home / 1,123,138.38-1,550,206.36-639,988.32

Finding the Fourth Proportional to 1,123,138.38, 1,550,206.36 and 639,988.32

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Solution

The fourth proportional to 1,123,138.38, 1,550,206.36 and 639,988.32 is: 883,340.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123,138.38 : 1,550,206.36 = 639,988.32 : x
  2. Step 2: Convert to fraction form
    1,123,138.38/1,550,206.36 = 639,988.32/x
  3. Step 3: Cross multiply
    1,123,138.38x = 1,550,206.36 × 639,988.32
  4. Step 4: Simplify right side
    1,123,138.38x = 992,113,963,989.72
  5. Step 5: Solve for x
    x = 992,113,963,989.72/1,123,138.38
  6. Step 6: Final answer
    x = 883,340.81

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Double scale
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1.5x scale

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.