Home / 680,606.42-1,020,909.78-280,807.94

Finding the Fourth Proportional to 680,606.42, 1,020,909.78 and 280,807.94

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Solution

The fourth proportional to 680,606.42, 1,020,909.78 and 280,807.94 is: 421,211.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,606.42 : 1,020,909.78 = 280,807.94 : x
  2. Step 2: Convert to fraction form
    680,606.42/1,020,909.78 = 280,807.94/x
  3. Step 3: Cross multiply
    680,606.42x = 1,020,909.78 × 280,807.94
  4. Step 4: Simplify right side
    680,606.42x = 286,679,572,247.65
  5. Step 5: Solve for x
    x = 286,679,572,247.65/680,606.42
  6. Step 6: Final answer
    x = 421,211.97

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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.