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Finding the Third Proportional to 286,688 and 430,140

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Solution

The third proportional to 286,688 and 430,140 is: 645,372.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,688 : 430,140 = 430,140 : x
  2. Step 2: Convert to fraction form
    286,688/430,140 = 430,140/x
  3. Step 3: Cross multiply
    286,688x = 430,140 × 430,140
  4. Step 4: Simplify right side
    286,688x = 185,020,419,600
  5. Step 5: Solve for x
    x = 185,020,419,600/286,688
  6. Step 6: Final answer
    x = 645,372.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.