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Finding the Third Proportional to 395,740 and 553,578

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Solution

The third proportional to 395,740 and 553,578 is: 774,368.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,740 : 553,578 = 553,578 : x
  2. Step 2: Convert to fraction form
    395,740/553,578 = 553,578/x
  3. Step 3: Cross multiply
    395,740x = 553,578 × 553,578
  4. Step 4: Simplify right side
    395,740x = 306,448,602,084
  5. Step 5: Solve for x
    x = 306,448,602,084/395,740
  6. Step 6: Final answer
    x = 774,368.53

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.