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Finding the Fourth Proportional to 398,747, 550,263.30 and 217,460.36

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Solution

The fourth proportional to 398,747, 550,263.30 and 217,460.36 is: 300,091.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,747 : 550,263.30 = 217,460.36 : x
  2. Step 2: Convert to fraction form
    398,747/550,263.30 = 217,460.36/x
  3. Step 3: Cross multiply
    398,747x = 550,263.30 × 217,460.36
  4. Step 4: Simplify right side
    398,747x = 119,660,455,312.79
  5. Step 5: Solve for x
    x = 119,660,455,312.79/398,747
  6. Step 6: Final answer
    x = 300,091.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.