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Finding the Fourth Proportional to 313,565.80, 469,830.30 and 266,909.80

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Solution

The fourth proportional to 313,565.80, 469,830.30 and 266,909.80 is: 399,923.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,565.80 : 469,830.30 = 266,909.80 : x
  2. Step 2: Convert to fraction form
    313,565.80/469,830.30 = 266,909.80/x
  3. Step 3: Cross multiply
    313,565.80x = 469,830.30 × 266,909.80
  4. Step 4: Simplify right side
    313,565.80x = 125,402,311,406.94
  5. Step 5: Solve for x
    x = 125,402,311,406.94/313,565.80
  6. Step 6: Final answer
    x = 399,923.43

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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.