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Finding the Third Proportional to 787,428 and 1,221,588

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Solution

The third proportional to 787,428 and 1,221,588 is: 1,895,128.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,428 : 1,221,588 = 1,221,588 : x
  2. Step 2: Convert to fraction form
    787,428/1,221,588 = 1,221,588/x
  3. Step 3: Cross multiply
    787,428x = 1,221,588 × 1,221,588
  4. Step 4: Simplify right side
    787,428x = 1,492,277,241,744
  5. Step 5: Solve for x
    x = 1,492,277,241,744/787,428
  6. Step 6: Final answer
    x = 1,895,128.50

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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.