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Finding the Fourth Proportional to 662,897,798.84, 914,638,986.42 and 427,898,131.40

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Solution

The fourth proportional to 662,897,798.84, 914,638,986.42 and 427,898,131.40 is: 590,396,157.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,897,798.84 : 914,638,986.42 = 427,898,131.40 : x
  2. Step 2: Convert to fraction form
    662,897,798.84/914,638,986.42 = 427,898,131.40/x
  3. Step 3: Cross multiply
    662,897,798.84x = 914,638,986.42 × 427,898,131.40
  4. Step 4: Simplify right side
    662,897,798.84x = 391,372,313,194,707,904
  5. Step 5: Solve for x
    x = 391,372,313,194,707,904/662,897,798.84
  6. Step 6: Final answer
    x = 590,396,157.42

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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.