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Finding the Fourth Proportional to 455,505.60, 628,860 and 302,750.88

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Solution

The fourth proportional to 455,505.60, 628,860 and 302,750.88 is: 417,970.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,505.60 : 628,860 = 302,750.88 : x
  2. Step 2: Convert to fraction form
    455,505.60/628,860 = 302,750.88/x
  3. Step 3: Cross multiply
    455,505.60x = 628,860 × 302,750.88
  4. Step 4: Simplify right side
    455,505.60x = 190,387,918,396.80
  5. Step 5: Solve for x
    x = 190,387,918,396.80/455,505.60
  6. Step 6: Final answer
    x = 417,970.53

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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.