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Finding the Fourth Proportional to 280,246.58, 420,358.11 and 130,435.34

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Solution

The fourth proportional to 280,246.58, 420,358.11 and 130,435.34 is: 195,647.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,246.58 : 420,358.11 = 130,435.34 : x
  2. Step 2: Convert to fraction form
    280,246.58/420,358.11 = 130,435.34/x
  3. Step 3: Cross multiply
    280,246.58x = 420,358.11 × 130,435.34
  4. Step 4: Simplify right side
    280,246.58x = 54,829,552,999.61
  5. Step 5: Solve for x
    x = 54,829,552,999.61/280,246.58
  6. Step 6: Final answer
    x = 195,647.54

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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.