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Finding the Third Proportional to 428,808 and 630,364

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Solution

The third proportional to 428,808 and 630,364 is: 926,658.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,808 : 630,364 = 630,364 : x
  2. Step 2: Convert to fraction form
    428,808/630,364 = 630,364/x
  3. Step 3: Cross multiply
    428,808x = 630,364 × 630,364
  4. Step 4: Simplify right side
    428,808x = 397,358,772,496
  5. Step 5: Solve for x
    x = 397,358,772,496/428,808
  6. Step 6: Final answer
    x = 926,658.95

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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.