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Finding the Fourth Proportional to 260,305.53, 390,012.69 and 142,059.92

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Solution

The fourth proportional to 260,305.53, 390,012.69 and 142,059.92 is: 212,846.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,305.53 : 390,012.69 = 142,059.92 : x
  2. Step 2: Convert to fraction form
    260,305.53/390,012.69 = 142,059.92/x
  3. Step 3: Cross multiply
    260,305.53x = 390,012.69 × 142,059.92
  4. Step 4: Simplify right side
    260,305.53x = 55,405,169,590.32
  5. Step 5: Solve for x
    x = 55,405,169,590.32/260,305.53
  6. Step 6: Final answer
    x = 212,846.69

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1.5x scale

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.