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Finding the Fourth Proportional to 545,116.80, 817,675.20 and 308,920.80

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Solution

The fourth proportional to 545,116.80, 817,675.20 and 308,920.80 is: 463,381.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,116.80 : 817,675.20 = 308,920.80 : x
  2. Step 2: Convert to fraction form
    545,116.80/817,675.20 = 308,920.80/x
  3. Step 3: Cross multiply
    545,116.80x = 817,675.20 × 308,920.80
  4. Step 4: Simplify right side
    545,116.80x = 252,596,876,924.16
  5. Step 5: Solve for x
    x = 252,596,876,924.16/545,116.80
  6. Step 6: Final answer
    x = 463,381.20

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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.