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Finding the Fourth Proportional to 451,678.82, 623,328.21 and 255,429.59

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Solution

The fourth proportional to 451,678.82, 623,328.21 and 255,429.59 is: 352,499.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,678.82 : 623,328.21 = 255,429.59 : x
  2. Step 2: Convert to fraction form
    451,678.82/623,328.21 = 255,429.59/x
  3. Step 3: Cross multiply
    451,678.82x = 623,328.21 × 255,429.59
  4. Step 4: Simplify right side
    451,678.82x = 159,216,465,999.09
  5. Step 5: Solve for x
    x = 159,216,465,999.09/451,678.82
  6. Step 6: Final answer
    x = 352,499.30

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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.