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Finding the Fourth Proportional to 1,315,811.20, 1,973,716.80 and 516,827.20

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Solution

The fourth proportional to 1,315,811.20, 1,973,716.80 and 516,827.20 is: 775,240.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,811.20 : 1,973,716.80 = 516,827.20 : x
  2. Step 2: Convert to fraction form
    1,315,811.20/1,973,716.80 = 516,827.20/x
  3. Step 3: Cross multiply
    1,315,811.20x = 1,973,716.80 × 516,827.20
  4. Step 4: Simplify right side
    1,315,811.20x = 1,020,070,527,336.96
  5. Step 5: Solve for x
    x = 1,020,070,527,336.96/1,315,811.20
  6. Step 6: Final answer
    x = 775,240.80

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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.