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Finding the Fourth Proportional to 449,319.72, 674,074.28 and 145,690.21

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Solution

The fourth proportional to 449,319.72, 674,074.28 and 145,690.21 is: 218,566.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,319.72 : 674,074.28 = 145,690.21 : x
  2. Step 2: Convert to fraction form
    449,319.72/674,074.28 = 145,690.21/x
  3. Step 3: Cross multiply
    449,319.72x = 674,074.28 × 145,690.21
  4. Step 4: Simplify right side
    449,319.72x = 98,206,020,995.16
  5. Step 5: Solve for x
    x = 98,206,020,995.16/449,319.72
  6. Step 6: Final answer
    x = 218,566.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.