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Finding the Fourth Proportional to 455,340.76, 628,353.98 and 251,387.52

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Solution

The fourth proportional to 455,340.76, 628,353.98 and 251,387.52 is: 346,905.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,340.76 : 628,353.98 = 251,387.52 : x
  2. Step 2: Convert to fraction form
    455,340.76/628,353.98 = 251,387.52/x
  3. Step 3: Cross multiply
    455,340.76x = 628,353.98 × 251,387.52
  4. Step 4: Simplify right side
    455,340.76x = 157,960,348,714.33
  5. Step 5: Solve for x
    x = 157,960,348,714.33/455,340.76
  6. Step 6: Final answer
    x = 346,905.80

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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.