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Finding the Fourth Proportional to 520,723.40, 779,270.70 and 310,512.20

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Solution

The fourth proportional to 520,723.40, 779,270.70 and 310,512.20 is: 464,686.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,723.40 : 779,270.70 = 310,512.20 : x
  2. Step 2: Convert to fraction form
    520,723.40/779,270.70 = 310,512.20/x
  3. Step 3: Cross multiply
    520,723.40x = 779,270.70 × 310,512.20
  4. Step 4: Simplify right side
    520,723.40x = 241,973,059,452.54
  5. Step 5: Solve for x
    x = 241,973,059,452.54/520,723.40
  6. Step 6: Final answer
    x = 464,686.36

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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.