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Finding the Fourth Proportional to 545,216.80, 817,825.20 and 431,492.80

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Solution

The fourth proportional to 545,216.80, 817,825.20 and 431,492.80 is: 647,239.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,216.80 : 817,825.20 = 431,492.80 : x
  2. Step 2: Convert to fraction form
    545,216.80/817,825.20 = 431,492.80/x
  3. Step 3: Cross multiply
    545,216.80x = 817,825.20 × 431,492.80
  4. Step 4: Simplify right side
    545,216.80x = 352,885,685,458.56
  5. Step 5: Solve for x
    x = 352,885,685,458.56/545,216.80
  6. Step 6: Final answer
    x = 647,239.20

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Similar ratio
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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.