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Finding the Fourth Proportional to 280,344.30, 420,516.45 and 210,360.30

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Solution

The fourth proportional to 280,344.30, 420,516.45 and 210,360.30 is: 315,540.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,344.30 : 420,516.45 = 210,360.30 : x
  2. Step 2: Convert to fraction form
    280,344.30/420,516.45 = 210,360.30/x
  3. Step 3: Cross multiply
    280,344.30x = 420,516.45 × 210,360.30
  4. Step 4: Simplify right side
    280,344.30x = 88,459,966,576.94
  5. Step 5: Solve for x
    x = 88,459,966,576.94/280,344.30
  6. Step 6: Final answer
    x = 315,540.45

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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.