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Finding the Fourth Proportional to 280,935.40, 421,812.70 and 218,676.20

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Solution

The fourth proportional to 280,935.40, 421,812.70 and 218,676.20 is: 328,333.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,935.40 : 421,812.70 = 218,676.20 : x
  2. Step 2: Convert to fraction form
    280,935.40/421,812.70 = 218,676.20/x
  3. Step 3: Cross multiply
    280,935.40x = 421,812.70 × 218,676.20
  4. Step 4: Simplify right side
    280,935.40x = 92,240,398,347.74
  5. Step 5: Solve for x
    x = 92,240,398,347.74/280,935.40
  6. Step 6: Final answer
    x = 328,333.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.