Home / 688,399.56-949,608.90-639,688.36

Finding the Fourth Proportional to 688,399.56, 949,608.90 and 639,688.36

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Solution

The fourth proportional to 688,399.56, 949,608.90 and 639,688.36 is: 882,414.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,399.56 : 949,608.90 = 639,688.36 : x
  2. Step 2: Convert to fraction form
    688,399.56/949,608.90 = 639,688.36/x
  3. Step 3: Cross multiply
    688,399.56x = 949,608.90 × 639,688.36
  4. Step 4: Simplify right side
    688,399.56x = 607,453,759,882.40
  5. Step 5: Solve for x
    x = 607,453,759,882.40/688,399.56
  6. Step 6: Final answer
    x = 882,414.51

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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.