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Finding the Third Proportional to 458,140 and 688,074

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Solution

The third proportional to 458,140 and 688,074 is: 1,033,408.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,140 : 688,074 = 688,074 : x
  2. Step 2: Convert to fraction form
    458,140/688,074 = 688,074/x
  3. Step 3: Cross multiply
    458,140x = 688,074 × 688,074
  4. Step 4: Simplify right side
    458,140x = 473,445,829,476
  5. Step 5: Solve for x
    x = 473,445,829,476/458,140
  6. Step 6: Final answer
    x = 1,033,408.63

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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.