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Finding the Fourth Proportional to 484,720, 668,740.45 and 280,659.53

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Solution

The fourth proportional to 484,720, 668,740.45 and 280,659.53 is: 387,209.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,720 : 668,740.45 = 280,659.53 : x
  2. Step 2: Convert to fraction form
    484,720/668,740.45 = 280,659.53/x
  3. Step 3: Cross multiply
    484,720x = 668,740.45 × 280,659.53
  4. Step 4: Simplify right side
    484,720x = 187,688,380,388.99
  5. Step 5: Solve for x
    x = 187,688,380,388.99/484,720
  6. Step 6: Final answer
    x = 387,209.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.