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Finding the Fourth Proportional to 280,604.80, 420,907.20 and 168,411.70

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Solution

The fourth proportional to 280,604.80, 420,907.20 and 168,411.70 is: 252,617.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,604.80 : 420,907.20 = 168,411.70 : x
  2. Step 2: Convert to fraction form
    280,604.80/420,907.20 = 168,411.70/x
  3. Step 3: Cross multiply
    280,604.80x = 420,907.20 × 168,411.70
  4. Step 4: Simplify right side
    280,604.80x = 70,885,697,094.24
  5. Step 5: Solve for x
    x = 70,885,697,094.24/280,604.80
  6. Step 6: Final answer
    x = 252,617.55

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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.