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Finding the Fourth Proportional to 520,059.80, 780,089.70 and 440,343.65

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Solution

The fourth proportional to 520,059.80, 780,089.70 and 440,343.65 is: 660,515.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,059.80 : 780,089.70 = 440,343.65 : x
  2. Step 2: Convert to fraction form
    520,059.80/780,089.70 = 440,343.65/x
  3. Step 3: Cross multiply
    520,059.80x = 780,089.70 × 440,343.65
  4. Step 4: Simplify right side
    520,059.80x = 343,507,545,825.41
  5. Step 5: Solve for x
    x = 343,507,545,825.41/520,059.80
  6. Step 6: Final answer
    x = 660,515.48

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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.