Home / 1,011.08-1,516.70-280.65

Finding the Fourth Proportional to 1,011.08, 1,516.70 and 280.65

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Solution

The fourth proportional to 1,011.08, 1,516.70 and 280.65 is: 421.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.08 : 1,516.70 = 280.65 : x
  2. Step 2: Convert to fraction form
    1,011.08/1,516.70 = 280.65/x
  3. Step 3: Cross multiply
    1,011.08x = 1,516.70 × 280.65
  4. Step 4: Simplify right side
    1,011.08x = 425,661.86
  5. Step 5: Solve for x
    x = 425,661.86/1,011.08
  6. Step 6: Final answer
    x = 421.00

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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.