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Finding the Fourth Proportional to 698,711.40, 964,302.03 and 388,645.29

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Solution

The fourth proportional to 698,711.40, 964,302.03 and 388,645.29 is: 536,375.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,711.40 : 964,302.03 = 388,645.29 : x
  2. Step 2: Convert to fraction form
    698,711.40/964,302.03 = 388,645.29/x
  3. Step 3: Cross multiply
    698,711.40x = 964,302.03 × 388,645.29
  4. Step 4: Simplify right side
    698,711.40x = 374,771,442,096.94
  5. Step 5: Solve for x
    x = 374,771,442,096.94/698,711.40
  6. Step 6: Final answer
    x = 536,375.16

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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.