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Finding the Fourth Proportional to 545,880.30, 818,820.45 and 280,159.80

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Solution

The fourth proportional to 545,880.30, 818,820.45 and 280,159.80 is: 420,239.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,880.30 : 818,820.45 = 280,159.80 : x
  2. Step 2: Convert to fraction form
    545,880.30/818,820.45 = 280,159.80/x
  3. Step 3: Cross multiply
    545,880.30x = 818,820.45 × 280,159.80
  4. Step 4: Simplify right side
    545,880.30x = 229,400,573,507.91
  5. Step 5: Solve for x
    x = 229,400,573,507.91/545,880.30
  6. Step 6: Final answer
    x = 420,239.70

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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.