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Finding the Fourth Proportional to 688,967.28, 950,775.24 and 398,619.60

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Solution

The fourth proportional to 688,967.28, 950,775.24 and 398,619.60 is: 550,095.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,967.28 : 950,775.24 = 398,619.60 : x
  2. Step 2: Convert to fraction form
    688,967.28/950,775.24 = 398,619.60/x
  3. Step 3: Cross multiply
    688,967.28x = 950,775.24 × 398,619.60
  4. Step 4: Simplify right side
    688,967.28x = 378,997,645,858.70
  5. Step 5: Solve for x
    x = 378,997,645,858.70/688,967.28
  6. Step 6: Final answer
    x = 550,095.28

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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.