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Finding the Fourth Proportional to 458,661,008.80, 643,939,397.60 and 458,661,008.80

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Solution

The fourth proportional to 458,661,008.80, 643,939,397.60 and 458,661,008.80 is: 643,939,397.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,661,008.80 : 643,939,397.60 = 458,661,008.80 : x
  2. Step 2: Convert to fraction form
    458,661,008.80/643,939,397.60 = 458,661,008.80/x
  3. Step 3: Cross multiply
    458,661,008.80x = 643,939,397.60 × 458,661,008.80
  4. Step 4: Simplify right side
    458,661,008.80x = 295,349,893,709,280,320
  5. Step 5: Solve for x
    x = 295,349,893,709,280,320/458,661,008.80
  6. Step 6: Final answer
    x = 643,939,397.60

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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.