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Finding the Third Proportional to 286,087.88 and 420,373.50

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Solution

The third proportional to 286,087.88 and 420,373.50 is: 617,690.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,087.88 : 420,373.50 = 420,373.50 : x
  2. Step 2: Convert to fraction form
    286,087.88/420,373.50 = 420,373.50/x
  3. Step 3: Cross multiply
    286,087.88x = 420,373.50 × 420,373.50
  4. Step 4: Simplify right side
    286,087.88x = 176,713,879,502.25
  5. Step 5: Solve for x
    x = 176,713,879,502.25/286,087.88
  6. Step 6: Final answer
    x = 617,690.91

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.