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Finding the Fourth Proportional to 455,379.12, 628,420.32 and 251,442.72

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Solution

The fourth proportional to 455,379.12, 628,420.32 and 251,442.72 is: 346,989.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,379.12 : 628,420.32 = 251,442.72 : x
  2. Step 2: Convert to fraction form
    455,379.12/628,420.32 = 251,442.72/x
  3. Step 3: Cross multiply
    455,379.12x = 628,420.32 × 251,442.72
  4. Step 4: Simplify right side
    455,379.12x = 158,011,714,564.07
  5. Step 5: Solve for x
    x = 158,011,714,564.07/455,379.12
  6. Step 6: Final answer
    x = 346,989.37

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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.