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Finding the Fourth Proportional to 450,941.08, 621,999 and 289,999.72

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Solution

The fourth proportional to 450,941.08, 621,999 and 289,999.72 is: 400,006.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,941.08 : 621,999 = 289,999.72 : x
  2. Step 2: Convert to fraction form
    450,941.08/621,999 = 289,999.72/x
  3. Step 3: Cross multiply
    450,941.08x = 621,999 × 289,999.72
  4. Step 4: Simplify right side
    450,941.08x = 180,379,535,840.28
  5. Step 5: Solve for x
    x = 180,379,535,840.28/450,941.08
  6. Step 6: Final answer
    x = 400,006.88

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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.