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Finding the Fourth Proportional to 455,089.96, 628,019.76 and 251,142.76

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Solution

The fourth proportional to 455,089.96, 628,019.76 and 251,142.76 is: 346,574.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,089.96 : 628,019.76 = 251,142.76 : x
  2. Step 2: Convert to fraction form
    455,089.96/628,019.76 = 251,142.76/x
  3. Step 3: Cross multiply
    455,089.96x = 628,019.76 × 251,142.76
  4. Step 4: Simplify right side
    455,089.96x = 157,722,615,860.94
  5. Step 5: Solve for x
    x = 157,722,615,860.94/455,089.96
  6. Step 6: Final answer
    x = 346,574.59

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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.