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Finding the Third Proportional to 987,440 and 2,153,280

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Solution

The third proportional to 987,440 and 2,153,280 is: 4,695,591.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,440 : 2,153,280 = 2,153,280 : x
  2. Step 2: Convert to fraction form
    987,440/2,153,280 = 2,153,280/x
  3. Step 3: Cross multiply
    987,440x = 2,153,280 × 2,153,280
  4. Step 4: Simplify right side
    987,440x = 4,636,614,758,400
  5. Step 5: Solve for x
    x = 4,636,614,758,400/987,440
  6. Step 6: Final answer
    x = 4,695,591.39

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.