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Finding the Fourth Proportional to 422,640,921.80, 590,487,967 and 422,640,921.80

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Solution

The fourth proportional to 422,640,921.80, 590,487,967 and 422,640,921.80 is: 590,487,967

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,640,921.80 : 590,487,967 = 422,640,921.80 : x
  2. Step 2: Convert to fraction form
    422,640,921.80/590,487,967 = 422,640,921.80/x
  3. Step 3: Cross multiply
    422,640,921.80x = 590,487,967 × 422,640,921.80
  4. Step 4: Simplify right side
    422,640,921.80x = 249,564,378,684,688,000
  5. Step 5: Solve for x
    x = 249,564,378,684,688,000/422,640,921.80
  6. Step 6: Final answer
    x = 590,487,967

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.