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Finding the Fourth Proportional to 662,139.57, 913,689.39 and 371,684.64

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Solution

The fourth proportional to 662,139.57, 913,689.39 and 371,684.64 is: 512,889.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,139.57 : 913,689.39 = 371,684.64 : x
  2. Step 2: Convert to fraction form
    662,139.57/913,689.39 = 371,684.64/x
  3. Step 3: Cross multiply
    662,139.57x = 913,689.39 × 371,684.64
  4. Step 4: Simplify right side
    662,139.57x = 339,604,311,993.97
  5. Step 5: Solve for x
    x = 339,604,311,993.97/662,139.57
  6. Step 6: Final answer
    x = 512,889.32

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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.