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Finding the Fourth Proportional to 262,805.70, 393,690.15 and 157,311.30

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Solution

The fourth proportional to 262,805.70, 393,690.15 and 157,311.30 is: 235,656.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,805.70 : 393,690.15 = 157,311.30 : x
  2. Step 2: Convert to fraction form
    262,805.70/393,690.15 = 157,311.30/x
  3. Step 3: Cross multiply
    262,805.70x = 393,690.15 × 157,311.30
  4. Step 4: Simplify right side
    262,805.70x = 61,931,909,293.70
  5. Step 5: Solve for x
    x = 61,931,909,293.70/262,805.70
  6. Step 6: Final answer
    x = 235,656.64

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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.