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Finding the Third Proportional to 290,730 and 392,679

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Solution

The third proportional to 290,730 and 392,679 is: 530,378.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,730 : 392,679 = 392,679 : x
  2. Step 2: Convert to fraction form
    290,730/392,679 = 392,679/x
  3. Step 3: Cross multiply
    290,730x = 392,679 × 392,679
  4. Step 4: Simplify right side
    290,730x = 154,196,797,041
  5. Step 5: Solve for x
    x = 154,196,797,041/290,730
  6. Step 6: Final answer
    x = 530,378.00

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.