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Finding the Third Proportional to 335,520 and 489,440

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Solution

The third proportional to 335,520 and 489,440 is: 713,970.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    335,520 : 489,440 = 489,440 : x
  2. Step 2: Convert to fraction form
    335,520/489,440 = 489,440/x
  3. Step 3: Cross multiply
    335,520x = 489,440 × 489,440
  4. Step 4: Simplify right side
    335,520x = 239,551,513,600
  5. Step 5: Solve for x
    x = 239,551,513,600/335,520
  6. Step 6: Final answer
    x = 713,970.89

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.