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Finding the Fourth Proportional to 7,157,649, 9,877,555.62 and 3,938,385

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Solution

The fourth proportional to 7,157,649, 9,877,555.62 and 3,938,385 is: 5,434,971.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,157,649 : 9,877,555.62 = 3,938,385 : x
  2. Step 2: Convert to fraction form
    7,157,649/9,877,555.62 = 3,938,385/x
  3. Step 3: Cross multiply
    7,157,649x = 9,877,555.62 × 3,938,385
  4. Step 4: Simplify right side
    7,157,649x = 38,901,616,890,473.70
  5. Step 5: Solve for x
    x = 38,901,616,890,473.70/7,157,649
  6. Step 6: Final answer
    x = 5,434,971.30

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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.