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Finding the Fourth Proportional to 280,477.15, 420,868.81 and 162,379.15

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Solution

The fourth proportional to 280,477.15, 420,868.81 and 162,379.15 is: 243,657.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,477.15 : 420,868.81 = 162,379.15 : x
  2. Step 2: Convert to fraction form
    280,477.15/420,868.81 = 162,379.15/x
  3. Step 3: Cross multiply
    280,477.15x = 420,868.81 × 162,379.15
  4. Step 4: Simplify right side
    280,477.15x = 68,340,318,780.11
  5. Step 5: Solve for x
    x = 68,340,318,780.11/280,477.15
  6. Step 6: Final answer
    x = 243,657.35

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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.