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Finding the Fourth Proportional to 540,429.80, 809,478.30 and 447,117.80

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Solution

The fourth proportional to 540,429.80, 809,478.30 and 447,117.80 is: 669,711.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,429.80 : 809,478.30 = 447,117.80 : x
  2. Step 2: Convert to fraction form
    540,429.80/809,478.30 = 447,117.80/x
  3. Step 3: Cross multiply
    540,429.80x = 809,478.30 × 447,117.80
  4. Step 4: Simplify right side
    540,429.80x = 361,932,156,643.74
  5. Step 5: Solve for x
    x = 361,932,156,643.74/540,429.80
  6. Step 6: Final answer
    x = 669,711.69

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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.