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Finding the Third Proportional to 424,742.63 and 643,290.75

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Solution

The third proportional to 424,742.63 and 643,290.75 is: 974,291.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,742.63 : 643,290.75 = 643,290.75 : x
  2. Step 2: Convert to fraction form
    424,742.63/643,290.75 = 643,290.75/x
  3. Step 3: Cross multiply
    424,742.63x = 643,290.75 × 643,290.75
  4. Step 4: Simplify right side
    424,742.63x = 413,822,989,035.56
  5. Step 5: Solve for x
    x = 413,822,989,035.56/424,742.63
  6. Step 6: Final answer
    x = 974,291.17

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.