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Finding the Fourth Proportional to 520,025.80, 780,038.70 and 440,309.65

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Solution

The fourth proportional to 520,025.80, 780,038.70 and 440,309.65 is: 660,464.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,025.80 : 780,038.70 = 440,309.65 : x
  2. Step 2: Convert to fraction form
    520,025.80/780,038.70 = 440,309.65/x
  3. Step 3: Cross multiply
    520,025.80x = 780,038.70 × 440,309.65
  4. Step 4: Simplify right side
    520,025.80x = 343,458,566,983.46
  5. Step 5: Solve for x
    x = 343,458,566,983.46/520,025.80
  6. Step 6: Final answer
    x = 660,464.48

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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.