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Finding the Fourth Proportional to 289,870.60, 434,589.90 and 149,729.80

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Solution

The fourth proportional to 289,870.60, 434,589.90 and 149,729.80 is: 224,483.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,870.60 : 434,589.90 = 149,729.80 : x
  2. Step 2: Convert to fraction form
    289,870.60/434,589.90 = 149,729.80/x
  3. Step 3: Cross multiply
    289,870.60x = 434,589.90 × 149,729.80
  4. Step 4: Simplify right side
    289,870.60x = 65,071,058,809.02
  5. Step 5: Solve for x
    x = 65,071,058,809.02/289,870.60
  6. Step 6: Final answer
    x = 224,483.13

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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.