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Finding the Fourth Proportional to 413,728.80, 621,176.40 and 256,264.80

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Solution

The fourth proportional to 413,728.80, 621,176.40 and 256,264.80 is: 384,758.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,728.80 : 621,176.40 = 256,264.80 : x
  2. Step 2: Convert to fraction form
    413,728.80/621,176.40 = 256,264.80/x
  3. Step 3: Cross multiply
    413,728.80x = 621,176.40 × 256,264.80
  4. Step 4: Simplify right side
    413,728.80x = 159,185,645,910.72
  5. Step 5: Solve for x
    x = 159,185,645,910.72/413,728.80
  6. Step 6: Final answer
    x = 384,758.44

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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.