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Finding the Fourth Proportional to 455,397.12, 628,456.32 and 254,188.80

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Solution

The fourth proportional to 455,397.12, 628,456.32 and 254,188.80 is: 350,785.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,397.12 : 628,456.32 = 254,188.80 : x
  2. Step 2: Convert to fraction form
    455,397.12/628,456.32 = 254,188.80/x
  3. Step 3: Cross multiply
    455,397.12x = 628,456.32 × 254,188.80
  4. Step 4: Simplify right side
    455,397.12x = 159,746,557,833.22
  5. Step 5: Solve for x
    x = 159,746,557,833.22/455,397.12
  6. Step 6: Final answer
    x = 350,785.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.