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Finding the Fourth Proportional to 303,658.10, 455,487.15 and 256,418.90

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Solution

The fourth proportional to 303,658.10, 455,487.15 and 256,418.90 is: 384,628.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,658.10 : 455,487.15 = 256,418.90 : x
  2. Step 2: Convert to fraction form
    303,658.10/455,487.15 = 256,418.90/x
  3. Step 3: Cross multiply
    303,658.10x = 455,487.15 × 256,418.90
  4. Step 4: Simplify right side
    303,658.10x = 116,795,513,967.14
  5. Step 5: Solve for x
    x = 116,795,513,967.14/303,658.10
  6. Step 6: Final answer
    x = 384,628.35

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Similar ratio
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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.