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Finding the Fourth Proportional to 340,069.60, 510,298.80 and 129,858.40

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Solution

The fourth proportional to 340,069.60, 510,298.80 and 129,858.40 is: 194,861.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,069.60 : 510,298.80 = 129,858.40 : x
  2. Step 2: Convert to fraction form
    340,069.60/510,298.80 = 129,858.40/x
  3. Step 3: Cross multiply
    340,069.60x = 510,298.80 × 129,858.40
  4. Step 4: Simplify right side
    340,069.60x = 66,266,585,689.92
  5. Step 5: Solve for x
    x = 66,266,585,689.92/340,069.60
  6. Step 6: Final answer
    x = 194,861.83

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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.