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Finding the Fourth Proportional to 520,720.40, 779,266.20 and 310,509.20

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Solution

The fourth proportional to 520,720.40, 779,266.20 and 310,509.20 is: 464,681.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,720.40 : 779,266.20 = 310,509.20 : x
  2. Step 2: Convert to fraction form
    520,720.40/779,266.20 = 310,509.20/x
  3. Step 3: Cross multiply
    520,720.40x = 779,266.20 × 310,509.20
  4. Step 4: Simplify right side
    520,720.40x = 241,969,324,349.04
  5. Step 5: Solve for x
    x = 241,969,324,349.04/520,720.40
  6. Step 6: Final answer
    x = 464,681.86

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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.