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Finding the Fourth Proportional to 255,731.80, 383,136.90 and 208,730.20

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Solution

The fourth proportional to 255,731.80, 383,136.90 and 208,730.20 is: 312,719.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,731.80 : 383,136.90 = 208,730.20 : x
  2. Step 2: Convert to fraction form
    255,731.80/383,136.90 = 208,730.20/x
  3. Step 3: Cross multiply
    255,731.80x = 383,136.90 × 208,730.20
  4. Step 4: Simplify right side
    255,731.80x = 79,972,241,764.38
  5. Step 5: Solve for x
    x = 79,972,241,764.38/255,731.80
  6. Step 6: Final answer
    x = 312,719.19

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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.