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Finding the Third Proportional to 420,440 and 652,803

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Solution

The third proportional to 420,440 and 652,803 is: 1,013,585.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,440 : 652,803 = 652,803 : x
  2. Step 2: Convert to fraction form
    420,440/652,803 = 652,803/x
  3. Step 3: Cross multiply
    420,440x = 652,803 × 652,803
  4. Step 4: Simplify right side
    420,440x = 426,151,756,809
  5. Step 5: Solve for x
    x = 426,151,756,809/420,440
  6. Step 6: Final answer
    x = 1,013,585.19

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.