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Finding the Fourth Proportional to 455,342.76, 628,356.74 and 251,389.52

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Solution

The fourth proportional to 455,342.76, 628,356.74 and 251,389.52 is: 346,908.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,342.76 : 628,356.74 = 251,389.52 : x
  2. Step 2: Convert to fraction form
    455,342.76/628,356.74 = 251,389.52/x
  3. Step 3: Cross multiply
    455,342.76x = 628,356.74 × 251,389.52
  4. Step 4: Simplify right side
    455,342.76x = 157,962,299,257.37
  5. Step 5: Solve for x
    x = 157,962,299,257.37/455,342.76
  6. Step 6: Final answer
    x = 346,908.56

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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.