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Finding the Third Proportional to 312,580 and 684,776

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Solution

The third proportional to 312,580 and 684,776 is: 1,500,154.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,580 : 684,776 = 684,776 : x
  2. Step 2: Convert to fraction form
    312,580/684,776 = 684,776/x
  3. Step 3: Cross multiply
    312,580x = 684,776 × 684,776
  4. Step 4: Simplify right side
    312,580x = 468,918,170,176
  5. Step 5: Solve for x
    x = 468,918,170,176/312,580
  6. Step 6: Final answer
    x = 1,500,154.11

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.