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Finding the Third Proportional to 315,495 and 688,813.88

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Solution

The third proportional to 315,495 and 688,813.88 is: 1,503,873.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,495 : 688,813.88 = 688,813.88 : x
  2. Step 2: Convert to fraction form
    315,495/688,813.88 = 688,813.88/x
  3. Step 3: Cross multiply
    315,495x = 688,813.88 × 688,813.88
  4. Step 4: Simplify right side
    315,495x = 474,464,554,392.52
  5. Step 5: Solve for x
    x = 474,464,554,392.52/315,495
  6. Step 6: Final answer
    x = 1,503,873.45

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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.