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Finding the Third Proportional to 142,798 and 313,618

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Solution

The third proportional to 142,798 and 313,618 is: 688,778.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,798 : 313,618 = 313,618 : x
  2. Step 2: Convert to fraction form
    142,798/313,618 = 313,618/x
  3. Step 3: Cross multiply
    142,798x = 313,618 × 313,618
  4. Step 4: Simplify right side
    142,798x = 98,356,249,924
  5. Step 5: Solve for x
    x = 98,356,249,924/142,798
  6. Step 6: Final answer
    x = 688,778.90

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.