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Finding the Fourth Proportional to 520,030.05, 780,045.08 and 440,313.90

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Solution

The fourth proportional to 520,030.05, 780,045.08 and 440,313.90 is: 660,470.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,030.05 : 780,045.08 = 440,313.90 : x
  2. Step 2: Convert to fraction form
    520,030.05/780,045.08 = 440,313.90/x
  3. Step 3: Cross multiply
    520,030.05x = 780,045.08 × 440,313.90
  4. Step 4: Simplify right side
    520,030.05x = 343,464,689,149.04
  5. Step 5: Solve for x
    x = 343,464,689,149.04/520,030.05
  6. Step 6: Final answer
    x = 660,470.85

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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.