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Finding the Third Proportional to 470,088 and 685,440

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Solution

The third proportional to 470,088 and 685,440 is: 999,446.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,088 : 685,440 = 685,440 : x
  2. Step 2: Convert to fraction form
    470,088/685,440 = 685,440/x
  3. Step 3: Cross multiply
    470,088x = 685,440 × 685,440
  4. Step 4: Simplify right side
    470,088x = 469,827,993,600
  5. Step 5: Solve for x
    x = 469,827,993,600/470,088
  6. Step 6: Final answer
    x = 999,446.90

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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.